1 /* -----------------------------------------------------------------------------
3 * (c) The GHC Team, 2000-2004
7 * ---------------------------------------------------------------------------*/
10 #include "PosixSource.h"
13 /* Linux needs _GNU_SOURCE to get RTLD_DEFAULT from <dlfcn.h> and
14 MREMAP_MAYMOVE from <sys/mman.h>.
25 #include "LinkerInternals.h"
29 #include "RtsTypeable.h"
32 #ifdef HAVE_SYS_TYPES_H
33 #include <sys/types.h>
39 #ifdef HAVE_SYS_STAT_H
43 #if defined(HAVE_DLFCN_H)
47 #if defined(cygwin32_HOST_OS)
52 #ifdef HAVE_SYS_TIME_H
56 #include <sys/fcntl.h>
57 #include <sys/termios.h>
58 #include <sys/utime.h>
59 #include <sys/utsname.h>
63 #if defined(ia64_HOST_ARCH) || defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
68 #if defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
76 #if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
77 # define OBJFORMAT_ELF
78 #elif defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
79 # define OBJFORMAT_PEi386
82 #elif defined(darwin_HOST_OS)
83 # define OBJFORMAT_MACHO
84 # include <mach-o/loader.h>
85 # include <mach-o/nlist.h>
86 # include <mach-o/reloc.h>
87 #if !defined(HAVE_DLFCN_H)
88 # include <mach-o/dyld.h>
90 #if defined(powerpc_HOST_ARCH)
91 # include <mach-o/ppc/reloc.h>
93 #if defined(x86_64_HOST_ARCH)
94 # include <mach-o/x86_64/reloc.h>
98 /* Hash table mapping symbol names to Symbol */
99 static /*Str*/HashTable *symhash;
101 /* Hash table mapping symbol names to StgStablePtr */
102 static /*Str*/HashTable *stablehash;
104 /* List of currently loaded objects */
105 ObjectCode *objects = NULL; /* initially empty */
107 #if defined(OBJFORMAT_ELF)
108 static int ocVerifyImage_ELF ( ObjectCode* oc );
109 static int ocGetNames_ELF ( ObjectCode* oc );
110 static int ocResolve_ELF ( ObjectCode* oc );
111 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
112 static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
114 #elif defined(OBJFORMAT_PEi386)
115 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
116 static int ocGetNames_PEi386 ( ObjectCode* oc );
117 static int ocResolve_PEi386 ( ObjectCode* oc );
118 #elif defined(OBJFORMAT_MACHO)
119 static int ocVerifyImage_MachO ( ObjectCode* oc );
120 static int ocGetNames_MachO ( ObjectCode* oc );
121 static int ocResolve_MachO ( ObjectCode* oc );
123 static int machoGetMisalignment( FILE * );
124 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
125 static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
127 #ifdef powerpc_HOST_ARCH
128 static void machoInitSymbolsWithoutUnderscore( void );
132 /* on x86_64 we have a problem with relocating symbol references in
133 * code that was compiled without -fPIC. By default, the small memory
134 * model is used, which assumes that symbol references can fit in a
135 * 32-bit slot. The system dynamic linker makes this work for
136 * references to shared libraries by either (a) allocating a jump
137 * table slot for code references, or (b) moving the symbol at load
138 * time (and copying its contents, if necessary) for data references.
140 * We unfortunately can't tell whether symbol references are to code
141 * or data. So for now we assume they are code (the vast majority
142 * are), and allocate jump-table slots. Unfortunately this will
143 * SILENTLY generate crashing code for data references. This hack is
144 * enabled by X86_64_ELF_NONPIC_HACK.
146 * One workaround is to use shared Haskell libraries. This is
147 * coming. Another workaround is to keep the static libraries but
148 * compile them with -fPIC, because that will generate PIC references
149 * to data which can be relocated. The PIC code is still too green to
150 * do this systematically, though.
153 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
155 * Naming Scheme for Symbol Macros
157 * SymI_*: symbol is internal to the RTS. It resides in an object
158 * file/library that is statically.
159 * SymE_*: symbol is external to the RTS library. It might be linked
162 * Sym*_HasProto : the symbol prototype is imported in an include file
163 * or defined explicitly
164 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
165 * default proto extern void sym(void);
167 #define X86_64_ELF_NONPIC_HACK 1
169 /* -----------------------------------------------------------------------------
170 * Built-in symbols from the RTS
173 typedef struct _RtsSymbolVal {
179 #define Maybe_Stable_Names SymI_HasProto(mkWeakzh_fast) \
180 SymI_HasProto(makeStableNamezh_fast) \
181 SymI_HasProto(finalizzeWeakzh_fast)
183 /* These are not available in GUM!!! -- HWL */
184 #define Maybe_Stable_Names
187 #if !defined (mingw32_HOST_OS)
188 #define RTS_POSIX_ONLY_SYMBOLS \
189 SymI_HasProto(shutdownHaskellAndSignal) \
190 SymI_NeedsProto(lockFile) \
191 SymI_NeedsProto(unlockFile) \
192 SymI_HasProto(signal_handlers) \
193 SymI_HasProto(stg_sig_install) \
194 SymI_NeedsProto(nocldstop)
197 #if defined (cygwin32_HOST_OS)
198 #define RTS_MINGW_ONLY_SYMBOLS /**/
199 /* Don't have the ability to read import libs / archives, so
200 * we have to stupidly list a lot of what libcygwin.a
203 #define RTS_CYGWIN_ONLY_SYMBOLS \
204 SymI_HasProto(regfree) \
205 SymI_HasProto(regexec) \
206 SymI_HasProto(regerror) \
207 SymI_HasProto(regcomp) \
208 SymI_HasProto(__errno) \
209 SymI_HasProto(access) \
210 SymI_HasProto(chmod) \
211 SymI_HasProto(chdir) \
212 SymI_HasProto(close) \
213 SymI_HasProto(creat) \
215 SymI_HasProto(dup2) \
216 SymI_HasProto(fstat) \
217 SymI_HasProto(fcntl) \
218 SymI_HasProto(getcwd) \
219 SymI_HasProto(getenv) \
220 SymI_HasProto(lseek) \
221 SymI_HasProto(open) \
222 SymI_HasProto(fpathconf) \
223 SymI_HasProto(pathconf) \
224 SymI_HasProto(stat) \
226 SymI_HasProto(tanh) \
227 SymI_HasProto(cosh) \
228 SymI_HasProto(sinh) \
229 SymI_HasProto(atan) \
230 SymI_HasProto(acos) \
231 SymI_HasProto(asin) \
237 SymI_HasProto(sqrt) \
238 SymI_HasProto(localtime_r) \
239 SymI_HasProto(gmtime_r) \
240 SymI_HasProto(mktime) \
241 SymI_NeedsProto(_imp___tzname) \
242 SymI_HasProto(gettimeofday) \
243 SymI_HasProto(timezone) \
244 SymI_HasProto(tcgetattr) \
245 SymI_HasProto(tcsetattr) \
246 SymI_HasProto(memcpy) \
247 SymI_HasProto(memmove) \
248 SymI_HasProto(realloc) \
249 SymI_HasProto(malloc) \
250 SymI_HasProto(free) \
251 SymI_HasProto(fork) \
252 SymI_HasProto(lstat) \
253 SymI_HasProto(isatty) \
254 SymI_HasProto(mkdir) \
255 SymI_HasProto(opendir) \
256 SymI_HasProto(readdir) \
257 SymI_HasProto(rewinddir) \
258 SymI_HasProto(closedir) \
259 SymI_HasProto(link) \
260 SymI_HasProto(mkfifo) \
261 SymI_HasProto(pipe) \
262 SymI_HasProto(read) \
263 SymI_HasProto(rename) \
264 SymI_HasProto(rmdir) \
265 SymI_HasProto(select) \
266 SymI_HasProto(system) \
267 SymI_HasProto(write) \
268 SymI_HasProto(strcmp) \
269 SymI_HasProto(strcpy) \
270 SymI_HasProto(strncpy) \
271 SymI_HasProto(strerror) \
272 SymI_HasProto(sigaddset) \
273 SymI_HasProto(sigemptyset) \
274 SymI_HasProto(sigprocmask) \
275 SymI_HasProto(umask) \
276 SymI_HasProto(uname) \
277 SymI_HasProto(unlink) \
278 SymI_HasProto(utime) \
279 SymI_HasProto(waitpid)
281 #elif !defined(mingw32_HOST_OS)
282 #define RTS_MINGW_ONLY_SYMBOLS /**/
283 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
284 #else /* defined(mingw32_HOST_OS) */
285 #define RTS_POSIX_ONLY_SYMBOLS /**/
286 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
288 /* Extra syms gen'ed by mingw-2's gcc-3.2: */
290 #define RTS_MINGW_EXTRA_SYMS \
291 SymI_NeedsProto(_imp____mb_cur_max) \
292 SymI_NeedsProto(_imp___pctype)
294 #define RTS_MINGW_EXTRA_SYMS
297 #if HAVE_GETTIMEOFDAY
298 #define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
300 #define RTS_MINGW_GETTIMEOFDAY_SYM /**/
303 /* These are statically linked from the mingw libraries into the ghc
304 executable, so we have to employ this hack. */
305 #define RTS_MINGW_ONLY_SYMBOLS \
306 SymI_HasProto(asyncReadzh_fast) \
307 SymI_HasProto(asyncWritezh_fast) \
308 SymI_HasProto(asyncDoProczh_fast) \
309 SymI_HasProto(memset) \
310 SymI_HasProto(inet_ntoa) \
311 SymI_HasProto(inet_addr) \
312 SymI_HasProto(htonl) \
313 SymI_HasProto(recvfrom) \
314 SymI_HasProto(listen) \
315 SymI_HasProto(bind) \
316 SymI_HasProto(shutdown) \
317 SymI_HasProto(connect) \
318 SymI_HasProto(htons) \
319 SymI_HasProto(ntohs) \
320 SymI_HasProto(getservbyname) \
321 SymI_HasProto(getservbyport) \
322 SymI_HasProto(getprotobynumber) \
323 SymI_HasProto(getprotobyname) \
324 SymI_HasProto(gethostbyname) \
325 SymI_HasProto(gethostbyaddr) \
326 SymI_HasProto(gethostname) \
327 SymI_HasProto(strcpy) \
328 SymI_HasProto(strncpy) \
329 SymI_HasProto(abort) \
330 SymI_NeedsProto(_alloca) \
331 SymI_NeedsProto(isxdigit) \
332 SymI_NeedsProto(isupper) \
333 SymI_NeedsProto(ispunct) \
334 SymI_NeedsProto(islower) \
335 SymI_NeedsProto(isspace) \
336 SymI_NeedsProto(isprint) \
337 SymI_NeedsProto(isdigit) \
338 SymI_NeedsProto(iscntrl) \
339 SymI_NeedsProto(isalpha) \
340 SymI_NeedsProto(isalnum) \
341 SymI_HasProto(strcmp) \
342 SymI_HasProto(memmove) \
343 SymI_HasProto(realloc) \
344 SymI_HasProto(malloc) \
346 SymI_HasProto(tanh) \
347 SymI_HasProto(cosh) \
348 SymI_HasProto(sinh) \
349 SymI_HasProto(atan) \
350 SymI_HasProto(acos) \
351 SymI_HasProto(asin) \
357 SymI_HasProto(sqrt) \
358 SymI_HasProto(powf) \
359 SymI_HasProto(tanhf) \
360 SymI_HasProto(coshf) \
361 SymI_HasProto(sinhf) \
362 SymI_HasProto(atanf) \
363 SymI_HasProto(acosf) \
364 SymI_HasProto(asinf) \
365 SymI_HasProto(tanf) \
366 SymI_HasProto(cosf) \
367 SymI_HasProto(sinf) \
368 SymI_HasProto(expf) \
369 SymI_HasProto(logf) \
370 SymI_HasProto(sqrtf) \
371 SymI_HasProto(memcpy) \
372 SymI_HasProto(rts_InstallConsoleEvent) \
373 SymI_HasProto(rts_ConsoleHandlerDone) \
374 SymI_NeedsProto(mktime) \
375 SymI_NeedsProto(_imp___timezone) \
376 SymI_NeedsProto(_imp___tzname) \
377 SymI_NeedsProto(_imp__tzname) \
378 SymI_NeedsProto(_imp___iob) \
379 SymI_NeedsProto(_imp___osver) \
380 SymI_NeedsProto(localtime) \
381 SymI_NeedsProto(gmtime) \
382 SymI_NeedsProto(opendir) \
383 SymI_NeedsProto(readdir) \
384 SymI_NeedsProto(rewinddir) \
385 RTS_MINGW_EXTRA_SYMS \
386 RTS_MINGW_GETTIMEOFDAY_SYM \
387 SymI_NeedsProto(closedir)
390 #if defined(darwin_TARGET_OS) && HAVE_PRINTF_LDBLSTUB
391 #define RTS_DARWIN_ONLY_SYMBOLS \
392 SymI_NeedsProto(asprintf$LDBLStub) \
393 SymI_NeedsProto(err$LDBLStub) \
394 SymI_NeedsProto(errc$LDBLStub) \
395 SymI_NeedsProto(errx$LDBLStub) \
396 SymI_NeedsProto(fprintf$LDBLStub) \
397 SymI_NeedsProto(fscanf$LDBLStub) \
398 SymI_NeedsProto(fwprintf$LDBLStub) \
399 SymI_NeedsProto(fwscanf$LDBLStub) \
400 SymI_NeedsProto(printf$LDBLStub) \
401 SymI_NeedsProto(scanf$LDBLStub) \
402 SymI_NeedsProto(snprintf$LDBLStub) \
403 SymI_NeedsProto(sprintf$LDBLStub) \
404 SymI_NeedsProto(sscanf$LDBLStub) \
405 SymI_NeedsProto(strtold$LDBLStub) \
406 SymI_NeedsProto(swprintf$LDBLStub) \
407 SymI_NeedsProto(swscanf$LDBLStub) \
408 SymI_NeedsProto(syslog$LDBLStub) \
409 SymI_NeedsProto(vasprintf$LDBLStub) \
410 SymI_NeedsProto(verr$LDBLStub) \
411 SymI_NeedsProto(verrc$LDBLStub) \
412 SymI_NeedsProto(verrx$LDBLStub) \
413 SymI_NeedsProto(vfprintf$LDBLStub) \
414 SymI_NeedsProto(vfscanf$LDBLStub) \
415 SymI_NeedsProto(vfwprintf$LDBLStub) \
416 SymI_NeedsProto(vfwscanf$LDBLStub) \
417 SymI_NeedsProto(vprintf$LDBLStub) \
418 SymI_NeedsProto(vscanf$LDBLStub) \
419 SymI_NeedsProto(vsnprintf$LDBLStub) \
420 SymI_NeedsProto(vsprintf$LDBLStub) \
421 SymI_NeedsProto(vsscanf$LDBLStub) \
422 SymI_NeedsProto(vswprintf$LDBLStub) \
423 SymI_NeedsProto(vswscanf$LDBLStub) \
424 SymI_NeedsProto(vsyslog$LDBLStub) \
425 SymI_NeedsProto(vwarn$LDBLStub) \
426 SymI_NeedsProto(vwarnc$LDBLStub) \
427 SymI_NeedsProto(vwarnx$LDBLStub) \
428 SymI_NeedsProto(vwprintf$LDBLStub) \
429 SymI_NeedsProto(vwscanf$LDBLStub) \
430 SymI_NeedsProto(warn$LDBLStub) \
431 SymI_NeedsProto(warnc$LDBLStub) \
432 SymI_NeedsProto(warnx$LDBLStub) \
433 SymI_NeedsProto(wcstold$LDBLStub) \
434 SymI_NeedsProto(wprintf$LDBLStub) \
435 SymI_NeedsProto(wscanf$LDBLStub)
437 #define RTS_DARWIN_ONLY_SYMBOLS
441 # define MAIN_CAP_SYM SymI_HasProto(MainCapability)
443 # define MAIN_CAP_SYM
446 #if !defined(mingw32_HOST_OS)
447 #define RTS_USER_SIGNALS_SYMBOLS \
448 SymI_HasProto(setIOManagerPipe)
450 #define RTS_USER_SIGNALS_SYMBOLS \
451 SymI_HasProto(sendIOManagerEvent) \
452 SymI_HasProto(readIOManagerEvent) \
453 SymI_HasProto(getIOManagerEvent) \
454 SymI_HasProto(console_handler)
457 #define RTS_LIBFFI_SYMBOLS \
458 SymE_NeedsProto(ffi_prep_cif) \
459 SymE_NeedsProto(ffi_call) \
460 SymE_NeedsProto(ffi_type_void) \
461 SymE_NeedsProto(ffi_type_float) \
462 SymE_NeedsProto(ffi_type_double) \
463 SymE_NeedsProto(ffi_type_sint64) \
464 SymE_NeedsProto(ffi_type_uint64) \
465 SymE_NeedsProto(ffi_type_sint32) \
466 SymE_NeedsProto(ffi_type_uint32) \
467 SymE_NeedsProto(ffi_type_sint16) \
468 SymE_NeedsProto(ffi_type_uint16) \
469 SymE_NeedsProto(ffi_type_sint8) \
470 SymE_NeedsProto(ffi_type_uint8) \
471 SymE_NeedsProto(ffi_type_pointer)
473 #ifdef TABLES_NEXT_TO_CODE
474 #define RTS_RET_SYMBOLS /* nothing */
476 #define RTS_RET_SYMBOLS \
477 SymI_HasProto(stg_enter_ret) \
478 SymI_HasProto(stg_gc_fun_ret) \
479 SymI_HasProto(stg_ap_v_ret) \
480 SymI_HasProto(stg_ap_f_ret) \
481 SymI_HasProto(stg_ap_d_ret) \
482 SymI_HasProto(stg_ap_l_ret) \
483 SymI_HasProto(stg_ap_n_ret) \
484 SymI_HasProto(stg_ap_p_ret) \
485 SymI_HasProto(stg_ap_pv_ret) \
486 SymI_HasProto(stg_ap_pp_ret) \
487 SymI_HasProto(stg_ap_ppv_ret) \
488 SymI_HasProto(stg_ap_ppp_ret) \
489 SymI_HasProto(stg_ap_pppv_ret) \
490 SymI_HasProto(stg_ap_pppp_ret) \
491 SymI_HasProto(stg_ap_ppppp_ret) \
492 SymI_HasProto(stg_ap_pppppp_ret)
495 /* On Windows, we link libgmp.a statically into libHSrts.dll */
496 #ifdef mingw32_HOST_OS
498 SymI_HasProto(__gmpz_cmp) \
499 SymI_HasProto(__gmpz_cmp_si) \
500 SymI_HasProto(__gmpz_cmp_ui) \
501 SymI_HasProto(__gmpz_get_si) \
502 SymI_HasProto(__gmpz_get_ui)
505 SymE_HasProto(__gmpz_cmp) \
506 SymE_HasProto(__gmpz_cmp_si) \
507 SymE_HasProto(__gmpz_cmp_ui) \
508 SymE_HasProto(__gmpz_get_si) \
509 SymE_HasProto(__gmpz_get_ui)
512 #define RTS_SYMBOLS \
514 SymI_HasProto(StgReturn) \
515 SymI_HasProto(stg_enter_info) \
516 SymI_HasProto(stg_gc_void_info) \
517 SymI_HasProto(__stg_gc_enter_1) \
518 SymI_HasProto(stg_gc_noregs) \
519 SymI_HasProto(stg_gc_unpt_r1_info) \
520 SymI_HasProto(stg_gc_unpt_r1) \
521 SymI_HasProto(stg_gc_unbx_r1_info) \
522 SymI_HasProto(stg_gc_unbx_r1) \
523 SymI_HasProto(stg_gc_f1_info) \
524 SymI_HasProto(stg_gc_f1) \
525 SymI_HasProto(stg_gc_d1_info) \
526 SymI_HasProto(stg_gc_d1) \
527 SymI_HasProto(stg_gc_l1_info) \
528 SymI_HasProto(stg_gc_l1) \
529 SymI_HasProto(__stg_gc_fun) \
530 SymI_HasProto(stg_gc_fun_info) \
531 SymI_HasProto(stg_gc_gen) \
532 SymI_HasProto(stg_gc_gen_info) \
533 SymI_HasProto(stg_gc_gen_hp) \
534 SymI_HasProto(stg_gc_ut) \
535 SymI_HasProto(stg_gen_yield) \
536 SymI_HasProto(stg_yield_noregs) \
537 SymI_HasProto(stg_yield_to_interpreter) \
538 SymI_HasProto(stg_gen_block) \
539 SymI_HasProto(stg_block_noregs) \
540 SymI_HasProto(stg_block_1) \
541 SymI_HasProto(stg_block_takemvar) \
542 SymI_HasProto(stg_block_putmvar) \
544 SymI_HasProto(MallocFailHook) \
545 SymI_HasProto(OnExitHook) \
546 SymI_HasProto(OutOfHeapHook) \
547 SymI_HasProto(StackOverflowHook) \
548 SymI_HasProto(__encodeDouble) \
549 SymI_HasProto(__encodeFloat) \
550 SymI_HasProto(addDLL) \
552 SymI_HasProto(__int_encodeDouble) \
553 SymI_HasProto(__word_encodeDouble) \
554 SymI_HasProto(__2Int_encodeDouble) \
555 SymI_HasProto(__int_encodeFloat) \
556 SymI_HasProto(__word_encodeFloat) \
557 SymI_HasProto(andIntegerzh_fast) \
558 SymI_HasProto(atomicallyzh_fast) \
559 SymI_HasProto(barf) \
560 SymI_HasProto(debugBelch) \
561 SymI_HasProto(errorBelch) \
562 SymI_HasProto(asyncExceptionsBlockedzh_fast) \
563 SymI_HasProto(blockAsyncExceptionszh_fast) \
564 SymI_HasProto(catchzh_fast) \
565 SymI_HasProto(catchRetryzh_fast) \
566 SymI_HasProto(catchSTMzh_fast) \
567 SymI_HasProto(checkzh_fast) \
568 SymI_HasProto(closure_flags) \
569 SymI_HasProto(cmp_thread) \
570 SymI_HasProto(cmpIntegerzh_fast) \
571 SymI_HasProto(cmpIntegerIntzh_fast) \
572 SymI_HasProto(complementIntegerzh_fast) \
573 SymI_HasProto(createAdjustor) \
574 SymI_HasProto(decodeDoublezh_fast) \
575 SymI_HasProto(decodeFloatzh_fast) \
576 SymI_HasProto(decodeDoublezu2Intzh_fast) \
577 SymI_HasProto(decodeFloatzuIntzh_fast) \
578 SymI_HasProto(defaultsHook) \
579 SymI_HasProto(delayzh_fast) \
580 SymI_HasProto(deRefWeakzh_fast) \
581 SymI_HasProto(deRefStablePtrzh_fast) \
582 SymI_HasProto(dirty_MUT_VAR) \
583 SymI_HasProto(divExactIntegerzh_fast) \
584 SymI_HasProto(divModIntegerzh_fast) \
585 SymI_HasProto(forkzh_fast) \
586 SymI_HasProto(forkOnzh_fast) \
587 SymI_HasProto(forkProcess) \
588 SymI_HasProto(forkOS_createThread) \
589 SymI_HasProto(freeHaskellFunctionPtr) \
590 SymI_HasProto(freeStablePtr) \
591 SymI_HasProto(getOrSetTypeableStore) \
592 SymI_HasProto(gcdIntegerzh_fast) \
593 SymI_HasProto(gcdIntegerIntzh_fast) \
594 SymI_HasProto(gcdIntzh_fast) \
595 SymI_HasProto(genSymZh) \
596 SymI_HasProto(genericRaise) \
597 SymI_HasProto(getProgArgv) \
598 SymI_HasProto(getFullProgArgv) \
599 SymI_HasProto(getStablePtr) \
600 SymI_HasProto(hs_init) \
601 SymI_HasProto(hs_exit) \
602 SymI_HasProto(hs_set_argv) \
603 SymI_HasProto(hs_add_root) \
604 SymI_HasProto(hs_perform_gc) \
605 SymI_HasProto(hs_free_stable_ptr) \
606 SymI_HasProto(hs_free_fun_ptr) \
607 SymI_HasProto(hs_hpc_rootModule) \
608 SymI_HasProto(initLinker) \
609 SymI_HasProto(unpackClosurezh_fast) \
610 SymI_HasProto(getApStackValzh_fast) \
611 SymI_HasProto(int2Integerzh_fast) \
612 SymI_HasProto(integer2Intzh_fast) \
613 SymI_HasProto(integer2Wordzh_fast) \
614 SymI_HasProto(isCurrentThreadBoundzh_fast) \
615 SymI_HasProto(isDoubleDenormalized) \
616 SymI_HasProto(isDoubleInfinite) \
617 SymI_HasProto(isDoubleNaN) \
618 SymI_HasProto(isDoubleNegativeZero) \
619 SymI_HasProto(isEmptyMVarzh_fast) \
620 SymI_HasProto(isFloatDenormalized) \
621 SymI_HasProto(isFloatInfinite) \
622 SymI_HasProto(isFloatNaN) \
623 SymI_HasProto(isFloatNegativeZero) \
624 SymI_HasProto(killThreadzh_fast) \
625 SymI_HasProto(loadObj) \
626 SymI_HasProto(insertStableSymbol) \
627 SymI_HasProto(insertSymbol) \
628 SymI_HasProto(lookupSymbol) \
629 SymI_HasProto(makeStablePtrzh_fast) \
630 SymI_HasProto(minusIntegerzh_fast) \
631 SymI_HasProto(mkApUpd0zh_fast) \
632 SymI_HasProto(myThreadIdzh_fast) \
633 SymI_HasProto(labelThreadzh_fast) \
634 SymI_HasProto(newArrayzh_fast) \
635 SymI_HasProto(newBCOzh_fast) \
636 SymI_HasProto(newByteArrayzh_fast) \
637 SymI_HasProto_redirect(newCAF, newDynCAF) \
638 SymI_HasProto(newMVarzh_fast) \
639 SymI_HasProto(newMutVarzh_fast) \
640 SymI_HasProto(newTVarzh_fast) \
641 SymI_HasProto(noDuplicatezh_fast) \
642 SymI_HasProto(atomicModifyMutVarzh_fast) \
643 SymI_HasProto(newPinnedByteArrayzh_fast) \
644 SymI_HasProto(newSpark) \
645 SymI_HasProto(orIntegerzh_fast) \
646 SymI_HasProto(performGC) \
647 SymI_HasProto(performMajorGC) \
648 SymI_HasProto(plusIntegerzh_fast) \
649 SymI_HasProto(prog_argc) \
650 SymI_HasProto(prog_argv) \
651 SymI_HasProto(putMVarzh_fast) \
652 SymI_HasProto(quotIntegerzh_fast) \
653 SymI_HasProto(quotRemIntegerzh_fast) \
654 SymI_HasProto(raisezh_fast) \
655 SymI_HasProto(raiseIOzh_fast) \
656 SymI_HasProto(readTVarzh_fast) \
657 SymI_HasProto(readTVarIOzh_fast) \
658 SymI_HasProto(remIntegerzh_fast) \
659 SymI_HasProto(resetNonBlockingFd) \
660 SymI_HasProto(resumeThread) \
661 SymI_HasProto(resolveObjs) \
662 SymI_HasProto(retryzh_fast) \
663 SymI_HasProto(rts_apply) \
664 SymI_HasProto(rts_checkSchedStatus) \
665 SymI_HasProto(rts_eval) \
666 SymI_HasProto(rts_evalIO) \
667 SymI_HasProto(rts_evalLazyIO) \
668 SymI_HasProto(rts_evalStableIO) \
669 SymI_HasProto(rts_eval_) \
670 SymI_HasProto(rts_getBool) \
671 SymI_HasProto(rts_getChar) \
672 SymI_HasProto(rts_getDouble) \
673 SymI_HasProto(rts_getFloat) \
674 SymI_HasProto(rts_getInt) \
675 SymI_HasProto(rts_getInt8) \
676 SymI_HasProto(rts_getInt16) \
677 SymI_HasProto(rts_getInt32) \
678 SymI_HasProto(rts_getInt64) \
679 SymI_HasProto(rts_getPtr) \
680 SymI_HasProto(rts_getFunPtr) \
681 SymI_HasProto(rts_getStablePtr) \
682 SymI_HasProto(rts_getThreadId) \
683 SymI_HasProto(rts_getWord) \
684 SymI_HasProto(rts_getWord8) \
685 SymI_HasProto(rts_getWord16) \
686 SymI_HasProto(rts_getWord32) \
687 SymI_HasProto(rts_getWord64) \
688 SymI_HasProto(rts_lock) \
689 SymI_HasProto(rts_mkBool) \
690 SymI_HasProto(rts_mkChar) \
691 SymI_HasProto(rts_mkDouble) \
692 SymI_HasProto(rts_mkFloat) \
693 SymI_HasProto(rts_mkInt) \
694 SymI_HasProto(rts_mkInt8) \
695 SymI_HasProto(rts_mkInt16) \
696 SymI_HasProto(rts_mkInt32) \
697 SymI_HasProto(rts_mkInt64) \
698 SymI_HasProto(rts_mkPtr) \
699 SymI_HasProto(rts_mkFunPtr) \
700 SymI_HasProto(rts_mkStablePtr) \
701 SymI_HasProto(rts_mkString) \
702 SymI_HasProto(rts_mkWord) \
703 SymI_HasProto(rts_mkWord8) \
704 SymI_HasProto(rts_mkWord16) \
705 SymI_HasProto(rts_mkWord32) \
706 SymI_HasProto(rts_mkWord64) \
707 SymI_HasProto(rts_unlock) \
708 SymI_HasProto(rtsSupportsBoundThreads) \
709 SymI_HasProto(__hscore_get_saved_termios) \
710 SymI_HasProto(__hscore_set_saved_termios) \
711 SymI_HasProto(setProgArgv) \
712 SymI_HasProto(startupHaskell) \
713 SymI_HasProto(shutdownHaskell) \
714 SymI_HasProto(shutdownHaskellAndExit) \
715 SymI_HasProto(stable_ptr_table) \
716 SymI_HasProto(stackOverflow) \
717 SymI_HasProto(stg_CAF_BLACKHOLE_info) \
718 SymI_HasProto(awakenBlockedQueue) \
719 SymI_HasProto(startTimer) \
720 SymI_HasProto(stg_CHARLIKE_closure) \
721 SymI_HasProto(stg_MVAR_CLEAN_info) \
722 SymI_HasProto(stg_MVAR_DIRTY_info) \
723 SymI_HasProto(stg_IND_STATIC_info) \
724 SymI_HasProto(stg_INTLIKE_closure) \
725 SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info) \
726 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info) \
727 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info) \
728 SymI_HasProto(stg_WEAK_info) \
729 SymI_HasProto(stg_ap_v_info) \
730 SymI_HasProto(stg_ap_f_info) \
731 SymI_HasProto(stg_ap_d_info) \
732 SymI_HasProto(stg_ap_l_info) \
733 SymI_HasProto(stg_ap_n_info) \
734 SymI_HasProto(stg_ap_p_info) \
735 SymI_HasProto(stg_ap_pv_info) \
736 SymI_HasProto(stg_ap_pp_info) \
737 SymI_HasProto(stg_ap_ppv_info) \
738 SymI_HasProto(stg_ap_ppp_info) \
739 SymI_HasProto(stg_ap_pppv_info) \
740 SymI_HasProto(stg_ap_pppp_info) \
741 SymI_HasProto(stg_ap_ppppp_info) \
742 SymI_HasProto(stg_ap_pppppp_info) \
743 SymI_HasProto(stg_ap_0_fast) \
744 SymI_HasProto(stg_ap_v_fast) \
745 SymI_HasProto(stg_ap_f_fast) \
746 SymI_HasProto(stg_ap_d_fast) \
747 SymI_HasProto(stg_ap_l_fast) \
748 SymI_HasProto(stg_ap_n_fast) \
749 SymI_HasProto(stg_ap_p_fast) \
750 SymI_HasProto(stg_ap_pv_fast) \
751 SymI_HasProto(stg_ap_pp_fast) \
752 SymI_HasProto(stg_ap_ppv_fast) \
753 SymI_HasProto(stg_ap_ppp_fast) \
754 SymI_HasProto(stg_ap_pppv_fast) \
755 SymI_HasProto(stg_ap_pppp_fast) \
756 SymI_HasProto(stg_ap_ppppp_fast) \
757 SymI_HasProto(stg_ap_pppppp_fast) \
758 SymI_HasProto(stg_ap_1_upd_info) \
759 SymI_HasProto(stg_ap_2_upd_info) \
760 SymI_HasProto(stg_ap_3_upd_info) \
761 SymI_HasProto(stg_ap_4_upd_info) \
762 SymI_HasProto(stg_ap_5_upd_info) \
763 SymI_HasProto(stg_ap_6_upd_info) \
764 SymI_HasProto(stg_ap_7_upd_info) \
765 SymI_HasProto(stg_exit) \
766 SymI_HasProto(stg_sel_0_upd_info) \
767 SymI_HasProto(stg_sel_10_upd_info) \
768 SymI_HasProto(stg_sel_11_upd_info) \
769 SymI_HasProto(stg_sel_12_upd_info) \
770 SymI_HasProto(stg_sel_13_upd_info) \
771 SymI_HasProto(stg_sel_14_upd_info) \
772 SymI_HasProto(stg_sel_15_upd_info) \
773 SymI_HasProto(stg_sel_1_upd_info) \
774 SymI_HasProto(stg_sel_2_upd_info) \
775 SymI_HasProto(stg_sel_3_upd_info) \
776 SymI_HasProto(stg_sel_4_upd_info) \
777 SymI_HasProto(stg_sel_5_upd_info) \
778 SymI_HasProto(stg_sel_6_upd_info) \
779 SymI_HasProto(stg_sel_7_upd_info) \
780 SymI_HasProto(stg_sel_8_upd_info) \
781 SymI_HasProto(stg_sel_9_upd_info) \
782 SymI_HasProto(stg_upd_frame_info) \
783 SymI_HasProto(suspendThread) \
784 SymI_HasProto(takeMVarzh_fast) \
785 SymI_HasProto(threadStatuszh_fast) \
786 SymI_HasProto(timesIntegerzh_fast) \
787 SymI_HasProto(tryPutMVarzh_fast) \
788 SymI_HasProto(tryTakeMVarzh_fast) \
789 SymI_HasProto(unblockAsyncExceptionszh_fast) \
790 SymI_HasProto(unloadObj) \
791 SymI_HasProto(unsafeThawArrayzh_fast) \
792 SymI_HasProto(waitReadzh_fast) \
793 SymI_HasProto(waitWritezh_fast) \
794 SymI_HasProto(word2Integerzh_fast) \
795 SymI_HasProto(writeTVarzh_fast) \
796 SymI_HasProto(xorIntegerzh_fast) \
797 SymI_HasProto(yieldzh_fast) \
798 SymI_NeedsProto(stg_interp_constr_entry) \
799 SymI_HasProto(allocateExec) \
800 SymI_HasProto(freeExec) \
801 SymI_HasProto(getAllocations) \
802 SymI_HasProto(revertCAFs) \
803 SymI_HasProto(RtsFlags) \
804 SymI_NeedsProto(rts_breakpoint_io_action) \
805 SymI_NeedsProto(rts_stop_next_breakpoint) \
806 SymI_NeedsProto(rts_stop_on_exception) \
807 SymI_HasProto(stopTimer) \
808 SymI_HasProto(n_capabilities) \
809 RTS_USER_SIGNALS_SYMBOLS
811 #ifdef SUPPORT_LONG_LONGS
812 #define RTS_LONG_LONG_SYMS \
813 SymI_HasProto(int64ToIntegerzh_fast) \
814 SymI_HasProto(word64ToIntegerzh_fast)
816 #define RTS_LONG_LONG_SYMS /* nothing */
819 // 64-bit support functions in libgcc.a
820 #if defined(__GNUC__) && SIZEOF_VOID_P <= 4
821 #define RTS_LIBGCC_SYMBOLS \
822 SymI_NeedsProto(__divdi3) \
823 SymI_NeedsProto(__udivdi3) \
824 SymI_NeedsProto(__moddi3) \
825 SymI_NeedsProto(__umoddi3) \
826 SymI_NeedsProto(__muldi3) \
827 SymI_NeedsProto(__ashldi3) \
828 SymI_NeedsProto(__ashrdi3) \
829 SymI_NeedsProto(__lshrdi3) \
830 SymI_NeedsProto(__eprintf)
831 #elif defined(ia64_HOST_ARCH)
832 #define RTS_LIBGCC_SYMBOLS \
833 SymI_NeedsProto(__divdi3) \
834 SymI_NeedsProto(__udivdi3) \
835 SymI_NeedsProto(__moddi3) \
836 SymI_NeedsProto(__umoddi3) \
837 SymI_NeedsProto(__divsf3) \
838 SymI_NeedsProto(__divdf3)
840 #define RTS_LIBGCC_SYMBOLS
843 #if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
844 // Symbols that don't have a leading underscore
845 // on Mac OS X. They have to receive special treatment,
846 // see machoInitSymbolsWithoutUnderscore()
847 #define RTS_MACHO_NOUNDERLINE_SYMBOLS \
848 SymI_NeedsProto(saveFP) \
849 SymI_NeedsProto(restFP)
852 /* entirely bogus claims about types of these symbols */
853 #define SymI_NeedsProto(vvv) extern void vvv(void);
854 #if defined(__PIC__) && defined(mingw32_TARGET_OS)
855 #define SymE_HasProto(vvv) SymE_HasProto(vvv);
856 #define SymE_NeedsProto(vvv) extern void _imp__ ## vvv (void);
858 #define SymE_NeedsProto(vvv) SymI_NeedsProto(vvv);
859 #define SymE_HasProto(vvv) SymI_HasProto(vvv)
861 #define SymI_HasProto(vvv) /**/
862 #define SymI_HasProto_redirect(vvv,xxx) /**/
866 RTS_POSIX_ONLY_SYMBOLS
867 RTS_MINGW_ONLY_SYMBOLS
868 RTS_CYGWIN_ONLY_SYMBOLS
869 RTS_DARWIN_ONLY_SYMBOLS
872 #undef SymI_NeedsProto
874 #undef SymI_HasProto_redirect
876 #undef SymE_NeedsProto
878 #ifdef LEADING_UNDERSCORE
879 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
881 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
884 #define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
886 #define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
887 (void*)DLL_IMPORT_DATA_REF(vvv) },
889 #define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
890 #define SymE_NeedsProto(vvv) SymE_HasProto(vvv)
892 // SymI_HasProto_redirect allows us to redirect references to one symbol to
893 // another symbol. See newCAF/newDynCAF for an example.
894 #define SymI_HasProto_redirect(vvv,xxx) \
895 { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
898 static RtsSymbolVal rtsSyms[] = {
902 RTS_POSIX_ONLY_SYMBOLS
903 RTS_MINGW_ONLY_SYMBOLS
904 RTS_CYGWIN_ONLY_SYMBOLS
905 RTS_DARWIN_ONLY_SYMBOLS
908 #if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
909 // dyld stub code contains references to this,
910 // but it should never be called because we treat
911 // lazy pointers as nonlazy.
912 { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
914 { 0, 0 } /* sentinel */
919 /* -----------------------------------------------------------------------------
920 * Insert symbols into hash tables, checking for duplicates.
923 static void ghciInsertStrHashTable ( char* obj_name,
929 if (lookupHashTable(table, (StgWord)key) == NULL)
931 insertStrHashTable(table, (StgWord)key, data);
936 "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
938 "whilst processing object file\n"
940 "This could be caused by:\n"
941 " * Loading two different object files which export the same symbol\n"
942 " * Specifying the same object file twice on the GHCi command line\n"
943 " * An incorrect `package.conf' entry, causing some object to be\n"
945 "GHCi cannot safely continue in this situation. Exiting now. Sorry.\n"
952 /* -----------------------------------------------------------------------------
953 * initialize the object linker
957 static int linker_init_done = 0 ;
959 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
960 static void *dl_prog_handle;
968 /* Make initLinker idempotent, so we can call it
969 before evey relevant operation; that means we
970 don't need to initialise the linker separately */
971 if (linker_init_done == 1) { return; } else {
972 linker_init_done = 1;
975 stablehash = allocStrHashTable();
976 symhash = allocStrHashTable();
978 /* populate the symbol table with stuff from the RTS */
979 for (sym = rtsSyms; sym->lbl != NULL; sym++) {
980 ghciInsertStrHashTable("(GHCi built-in symbols)",
981 symhash, sym->lbl, sym->addr);
983 # if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
984 machoInitSymbolsWithoutUnderscore();
987 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
988 # if defined(RTLD_DEFAULT)
989 dl_prog_handle = RTLD_DEFAULT;
991 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
992 # endif /* RTLD_DEFAULT */
996 /* -----------------------------------------------------------------------------
997 * Loading DLL or .so dynamic libraries
998 * -----------------------------------------------------------------------------
1000 * Add a DLL from which symbols may be found. In the ELF case, just
1001 * do RTLD_GLOBAL-style add, so no further messing around needs to
1002 * happen in order that symbols in the loaded .so are findable --
1003 * lookupSymbol() will subsequently see them by dlsym on the program's
1004 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
1006 * In the PEi386 case, open the DLLs and put handles to them in a
1007 * linked list. When looking for a symbol, try all handles in the
1008 * list. This means that we need to load even DLLs that are guaranteed
1009 * to be in the ghc.exe image already, just so we can get a handle
1010 * to give to loadSymbol, so that we can find the symbols. For such
1011 * libraries, the LoadLibrary call should be a no-op except for returning
1016 #if defined(OBJFORMAT_PEi386)
1017 /* A record for storing handles into DLLs. */
1022 struct _OpenedDLL* next;
1027 /* A list thereof. */
1028 static OpenedDLL* opened_dlls = NULL;
1032 addDLL( char *dll_name )
1034 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1035 /* ------------------- ELF DLL loader ------------------- */
1041 // omitted: RTLD_NOW
1042 // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1043 hdl= dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
1046 /* dlopen failed; return a ptr to the error msg. */
1048 if (errmsg == NULL) errmsg = "addDLL: unknown error";
1055 # elif defined(OBJFORMAT_PEi386)
1056 /* ------------------- Win32 DLL loader ------------------- */
1064 /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1066 /* See if we've already got it, and ignore if so. */
1067 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1068 if (0 == strcmp(o_dll->name, dll_name))
1072 /* The file name has no suffix (yet) so that we can try
1073 both foo.dll and foo.drv
1075 The documentation for LoadLibrary says:
1076 If no file name extension is specified in the lpFileName
1077 parameter, the default library extension .dll is
1078 appended. However, the file name string can include a trailing
1079 point character (.) to indicate that the module name has no
1082 buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
1083 sprintf(buf, "%s.DLL", dll_name);
1084 instance = LoadLibrary(buf);
1085 if (instance == NULL) {
1086 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1087 // KAA: allow loading of drivers (like winspool.drv)
1088 sprintf(buf, "%s.DRV", dll_name);
1089 instance = LoadLibrary(buf);
1090 if (instance == NULL) {
1091 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1092 // #1883: allow loading of unix-style libfoo.dll DLLs
1093 sprintf(buf, "lib%s.DLL", dll_name);
1094 instance = LoadLibrary(buf);
1095 if (instance == NULL) {
1102 /* Add this DLL to the list of DLLs in which to search for symbols. */
1103 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
1104 o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
1105 strcpy(o_dll->name, dll_name);
1106 o_dll->instance = instance;
1107 o_dll->next = opened_dlls;
1108 opened_dlls = o_dll;
1114 sysErrorBelch(dll_name);
1116 /* LoadLibrary failed; return a ptr to the error msg. */
1117 return "addDLL: could not load DLL";
1120 barf("addDLL: not implemented on this platform");
1124 /* -----------------------------------------------------------------------------
1125 * insert a stable symbol in the hash table
1129 insertStableSymbol(char* obj_name, char* key, StgPtr p)
1131 ghciInsertStrHashTable(obj_name, stablehash, key, getStablePtr(p));
1135 /* -----------------------------------------------------------------------------
1136 * insert a symbol in the hash table
1139 insertSymbol(char* obj_name, char* key, void* data)
1141 ghciInsertStrHashTable(obj_name, symhash, key, data);
1144 /* -----------------------------------------------------------------------------
1145 * lookup a symbol in the hash table
1148 lookupSymbol( char *lbl )
1152 ASSERT(symhash != NULL);
1153 val = lookupStrHashTable(symhash, lbl);
1156 # if defined(OBJFORMAT_ELF)
1157 return dlsym(dl_prog_handle, lbl);
1158 # elif defined(OBJFORMAT_MACHO)
1160 /* On OS X 10.3 and later, we use dlsym instead of the old legacy
1163 HACK: On OS X, global symbols are prefixed with an underscore.
1164 However, dlsym wants us to omit the leading underscore from the
1165 symbol name. For now, we simply strip it off here (and ONLY
1168 ASSERT(lbl[0] == '_');
1169 return dlsym(dl_prog_handle, lbl+1);
1171 if(NSIsSymbolNameDefined(lbl)) {
1172 NSSymbol symbol = NSLookupAndBindSymbol(lbl);
1173 return NSAddressOfSymbol(symbol);
1177 # endif /* HAVE_DLFCN_H */
1178 # elif defined(OBJFORMAT_PEi386)
1181 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1182 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
1183 if (lbl[0] == '_') {
1184 /* HACK: if the name has an initial underscore, try stripping
1185 it off & look that up first. I've yet to verify whether there's
1186 a Rule that governs whether an initial '_' *should always* be
1187 stripped off when mapping from import lib name to the DLL name.
1189 sym = GetProcAddress(o_dll->instance, (lbl+1));
1191 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
1195 sym = GetProcAddress(o_dll->instance, lbl);
1197 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
1211 /* -----------------------------------------------------------------------------
1212 * Debugging aid: look in GHCi's object symbol tables for symbols
1213 * within DELTA bytes of the specified address, and show their names.
1216 void ghci_enquire ( char* addr );
1218 void ghci_enquire ( char* addr )
1223 const int DELTA = 64;
1228 for (oc = objects; oc; oc = oc->next) {
1229 for (i = 0; i < oc->n_symbols; i++) {
1230 sym = oc->symbols[i];
1231 if (sym == NULL) continue;
1234 a = lookupStrHashTable(symhash, sym);
1237 // debugBelch("ghci_enquire: can't find %s\n", sym);
1239 else if (addr-DELTA <= a && a <= addr+DELTA) {
1240 debugBelch("%p + %3d == `%s'\n", addr, (int)(a - addr), sym);
1247 #ifdef ia64_HOST_ARCH
1248 static unsigned int PLTSize(void);
1251 /* -----------------------------------------------------------------------------
1252 * Load an obj (populate the global symbol table, but don't resolve yet)
1254 * Returns: 1 if ok, 0 on error.
1257 loadObj( char *path )
1264 void *map_addr = NULL;
1270 /* debugBelch("loadObj %s\n", path ); */
1272 /* Check that we haven't already loaded this object.
1273 Ignore requests to load multiple times */
1277 for (o = objects; o; o = o->next) {
1278 if (0 == strcmp(o->fileName, path)) {
1280 break; /* don't need to search further */
1284 IF_DEBUG(linker, debugBelch(
1285 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1286 "same object file twice:\n"
1288 "GHCi will ignore this, but be warned.\n"
1290 return 1; /* success */
1294 oc = stgMallocBytes(sizeof(ObjectCode), "loadObj(oc)");
1296 # if defined(OBJFORMAT_ELF)
1297 oc->formatName = "ELF";
1298 # elif defined(OBJFORMAT_PEi386)
1299 oc->formatName = "PEi386";
1300 # elif defined(OBJFORMAT_MACHO)
1301 oc->formatName = "Mach-O";
1304 barf("loadObj: not implemented on this platform");
1307 r = stat(path, &st);
1308 if (r == -1) { return 0; }
1310 /* sigh, strdup() isn't a POSIX function, so do it the long way */
1311 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
1312 strcpy(oc->fileName, path);
1314 oc->fileSize = st.st_size;
1316 oc->sections = NULL;
1317 oc->proddables = NULL;
1319 /* chain it onto the list of objects */
1324 #define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
1326 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1328 #if defined(openbsd_HOST_OS)
1329 fd = open(path, O_RDONLY, S_IRUSR);
1331 fd = open(path, O_RDONLY);
1334 barf("loadObj: can't open `%s'", path);
1336 pagesize = getpagesize();
1338 #ifdef ia64_HOST_ARCH
1339 /* The PLT needs to be right before the object */
1340 n = ROUND_UP(PLTSize(), pagesize);
1341 oc->plt = mmap(NULL, n, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1342 if (oc->plt == MAP_FAILED)
1343 barf("loadObj: can't allocate PLT");
1346 map_addr = oc->plt + n;
1349 n = ROUND_UP(oc->fileSize, pagesize);
1351 /* Link objects into the lower 2Gb on x86_64. GHC assumes the
1352 * small memory model on this architecture (see gcc docs,
1355 * MAP_32BIT not available on OpenBSD/amd64
1357 #if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
1358 #define EXTRA_MAP_FLAGS MAP_32BIT
1360 #define EXTRA_MAP_FLAGS 0
1363 /* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
1364 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
1365 #define MAP_ANONYMOUS MAP_ANON
1368 oc->image = mmap(map_addr, n, PROT_EXEC|PROT_READ|PROT_WRITE,
1369 MAP_PRIVATE|EXTRA_MAP_FLAGS, fd, 0);
1370 if (oc->image == MAP_FAILED)
1371 barf("loadObj: can't map `%s'", path);
1375 #else /* !USE_MMAP */
1377 /* load the image into memory */
1378 f = fopen(path, "rb");
1380 barf("loadObj: can't read `%s'", path);
1382 # if defined(mingw32_HOST_OS)
1383 // TODO: We would like to use allocateExec here, but allocateExec
1384 // cannot currently allocate blocks large enough.
1385 oc->image = VirtualAlloc(NULL, oc->fileSize, MEM_RESERVE | MEM_COMMIT,
1386 PAGE_EXECUTE_READWRITE);
1387 # elif defined(darwin_HOST_OS)
1388 // In a Mach-O .o file, all sections can and will be misaligned
1389 // if the total size of the headers is not a multiple of the
1390 // desired alignment. This is fine for .o files that only serve
1391 // as input for the static linker, but it's not fine for us,
1392 // as SSE (used by gcc for floating point) and Altivec require
1393 // 16-byte alignment.
1394 // We calculate the correct alignment from the header before
1395 // reading the file, and then we misalign oc->image on purpose so
1396 // that the actual sections end up aligned again.
1397 oc->misalignment = machoGetMisalignment(f);
1398 oc->image = stgMallocBytes(oc->fileSize + oc->misalignment, "loadObj(image)");
1399 oc->image += oc->misalignment;
1401 oc->image = stgMallocBytes(oc->fileSize, "loadObj(image)");
1404 n = fread ( oc->image, 1, oc->fileSize, f );
1405 if (n != oc->fileSize)
1406 barf("loadObj: error whilst reading `%s'", path);
1409 #endif /* USE_MMAP */
1411 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1412 r = ocAllocateSymbolExtras_MachO ( oc );
1413 if (!r) { return r; }
1414 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1415 r = ocAllocateSymbolExtras_ELF ( oc );
1416 if (!r) { return r; }
1419 /* verify the in-memory image */
1420 # if defined(OBJFORMAT_ELF)
1421 r = ocVerifyImage_ELF ( oc );
1422 # elif defined(OBJFORMAT_PEi386)
1423 r = ocVerifyImage_PEi386 ( oc );
1424 # elif defined(OBJFORMAT_MACHO)
1425 r = ocVerifyImage_MachO ( oc );
1427 barf("loadObj: no verify method");
1429 if (!r) { return r; }
1431 /* build the symbol list for this image */
1432 # if defined(OBJFORMAT_ELF)
1433 r = ocGetNames_ELF ( oc );
1434 # elif defined(OBJFORMAT_PEi386)
1435 r = ocGetNames_PEi386 ( oc );
1436 # elif defined(OBJFORMAT_MACHO)
1437 r = ocGetNames_MachO ( oc );
1439 barf("loadObj: no getNames method");
1441 if (!r) { return r; }
1443 /* loaded, but not resolved yet */
1444 oc->status = OBJECT_LOADED;
1449 /* -----------------------------------------------------------------------------
1450 * resolve all the currently unlinked objects in memory
1452 * Returns: 1 if ok, 0 on error.
1462 for (oc = objects; oc; oc = oc->next) {
1463 if (oc->status != OBJECT_RESOLVED) {
1464 # if defined(OBJFORMAT_ELF)
1465 r = ocResolve_ELF ( oc );
1466 # elif defined(OBJFORMAT_PEi386)
1467 r = ocResolve_PEi386 ( oc );
1468 # elif defined(OBJFORMAT_MACHO)
1469 r = ocResolve_MachO ( oc );
1471 barf("resolveObjs: not implemented on this platform");
1473 if (!r) { return r; }
1474 oc->status = OBJECT_RESOLVED;
1480 /* -----------------------------------------------------------------------------
1481 * delete an object from the pool
1484 unloadObj( char *path )
1486 ObjectCode *oc, *prev;
1488 ASSERT(symhash != NULL);
1489 ASSERT(objects != NULL);
1494 for (oc = objects; oc; prev = oc, oc = oc->next) {
1495 if (!strcmp(oc->fileName,path)) {
1497 /* Remove all the mappings for the symbols within this
1502 for (i = 0; i < oc->n_symbols; i++) {
1503 if (oc->symbols[i] != NULL) {
1504 removeStrHashTable(symhash, oc->symbols[i], NULL);
1512 prev->next = oc->next;
1515 // We're going to leave this in place, in case there are
1516 // any pointers from the heap into it:
1517 // #ifdef mingw32_HOST_OS
1518 // VirtualFree(oc->image);
1520 // stgFree(oc->image);
1522 stgFree(oc->fileName);
1523 stgFree(oc->symbols);
1524 stgFree(oc->sections);
1530 errorBelch("unloadObj: can't find `%s' to unload", path);
1534 /* -----------------------------------------------------------------------------
1535 * Sanity checking. For each ObjectCode, maintain a list of address ranges
1536 * which may be prodded during relocation, and abort if we try and write
1537 * outside any of these.
1539 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
1542 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
1543 /* debugBelch("aPB %p %p %d\n", oc, start, size); */
1547 pb->next = oc->proddables;
1548 oc->proddables = pb;
1551 static void checkProddableBlock ( ObjectCode* oc, void* addr )
1554 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
1555 char* s = (char*)(pb->start);
1556 char* e = s + pb->size - 1;
1557 char* a = (char*)addr;
1558 /* Assumes that the biggest fixup involves a 4-byte write. This
1559 probably needs to be changed to 8 (ie, +7) on 64-bit
1561 if (a >= s && (a+3) <= e) return;
1563 barf("checkProddableBlock: invalid fixup in runtime linker");
1566 /* -----------------------------------------------------------------------------
1567 * Section management.
1569 static void addSection ( ObjectCode* oc, SectionKind kind,
1570 void* start, void* end )
1572 Section* s = stgMallocBytes(sizeof(Section), "addSection");
1576 s->next = oc->sections;
1579 debugBelch("addSection: %p-%p (size %d), kind %d\n",
1580 start, ((char*)end)-1, end - start + 1, kind );
1585 /* --------------------------------------------------------------------------
1587 * This is about allocating a small chunk of memory for every symbol in the
1588 * object file. We make sure that the SymboLExtras are always "in range" of
1589 * limited-range PC-relative instructions on various platforms by allocating
1590 * them right next to the object code itself.
1593 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
1596 ocAllocateSymbolExtras
1598 Allocate additional space at the end of the object file image to make room
1599 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
1601 PowerPC relative branch instructions have a 24 bit displacement field.
1602 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
1603 If a particular imported symbol is outside this range, we have to redirect
1604 the jump to a short piece of new code that just loads the 32bit absolute
1605 address and jumps there.
1606 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
1609 This function just allocates space for one SymbolExtra for every
1610 undefined symbol in the object file. The code for the jump islands is
1611 filled in by makeSymbolExtra below.
1614 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
1621 int misalignment = 0;
1622 #ifdef darwin_HOST_OS
1623 misalignment = oc->misalignment;
1629 // round up to the nearest 4
1630 aligned = (oc->fileSize + 3) & ~3;
1633 pagesize = getpagesize();
1634 n = ROUND_UP( oc->fileSize, pagesize );
1635 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
1637 /* we try to use spare space at the end of the last page of the
1638 * image for the jump islands, but if there isn't enough space
1639 * then we have to map some (anonymously, remembering MAP_32BIT).
1641 if( m > n ) // we need to allocate more pages
1643 oc->symbol_extras = mmap (NULL, sizeof(SymbolExtra) * count,
1644 PROT_EXEC|PROT_READ|PROT_WRITE,
1645 MAP_PRIVATE|MAP_ANONYMOUS|EXTRA_MAP_FLAGS,
1647 if (oc->symbol_extras == MAP_FAILED)
1649 errorBelch( "Unable to mmap() for jump islands\n" );
1652 #ifdef x86_64_HOST_ARCH
1653 if ((StgWord)oc->symbol_extras > 0x80000000)
1655 barf("mmap() returned memory outside 2Gb");
1661 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
1664 oc->image -= misalignment;
1665 oc->image = stgReallocBytes( oc->image,
1667 aligned + sizeof (SymbolExtra) * count,
1668 "ocAllocateSymbolExtras" );
1669 oc->image += misalignment;
1671 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
1672 #endif /* USE_MMAP */
1674 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
1677 oc->symbol_extras = NULL;
1679 oc->first_symbol_extra = first;
1680 oc->n_symbol_extras = count;
1685 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
1686 unsigned long symbolNumber,
1687 unsigned long target )
1691 ASSERT( symbolNumber >= oc->first_symbol_extra
1692 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
1694 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
1696 #ifdef powerpc_HOST_ARCH
1697 // lis r12, hi16(target)
1698 extra->jumpIsland.lis_r12 = 0x3d80;
1699 extra->jumpIsland.hi_addr = target >> 16;
1701 // ori r12, r12, lo16(target)
1702 extra->jumpIsland.ori_r12_r12 = 0x618c;
1703 extra->jumpIsland.lo_addr = target & 0xffff;
1706 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
1709 extra->jumpIsland.bctr = 0x4e800420;
1711 #ifdef x86_64_HOST_ARCH
1713 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
1714 extra->addr = target;
1715 memcpy(extra->jumpIsland, jmp, 6);
1723 /* --------------------------------------------------------------------------
1724 * PowerPC specifics (instruction cache flushing)
1725 * ------------------------------------------------------------------------*/
1727 #ifdef powerpc_TARGET_ARCH
1729 ocFlushInstructionCache
1731 Flush the data & instruction caches.
1732 Because the PPC has split data/instruction caches, we have to
1733 do that whenever we modify code at runtime.
1736 static void ocFlushInstructionCache( ObjectCode *oc )
1738 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
1739 unsigned long *p = (unsigned long *) oc->image;
1743 __asm__ volatile ( "dcbf 0,%0\n\t"
1751 __asm__ volatile ( "sync\n\t"
1757 /* --------------------------------------------------------------------------
1758 * PEi386 specifics (Win32 targets)
1759 * ------------------------------------------------------------------------*/
1761 /* The information for this linker comes from
1762 Microsoft Portable Executable
1763 and Common Object File Format Specification
1764 revision 5.1 January 1998
1765 which SimonM says comes from the MS Developer Network CDs.
1767 It can be found there (on older CDs), but can also be found
1770 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
1772 (this is Rev 6.0 from February 1999).
1774 Things move, so if that fails, try searching for it via
1776 http://www.google.com/search?q=PE+COFF+specification
1778 The ultimate reference for the PE format is the Winnt.h
1779 header file that comes with the Platform SDKs; as always,
1780 implementations will drift wrt their documentation.
1782 A good background article on the PE format is Matt Pietrek's
1783 March 1994 article in Microsoft System Journal (MSJ)
1784 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
1785 Win32 Portable Executable File Format." The info in there
1786 has recently been updated in a two part article in
1787 MSDN magazine, issues Feb and March 2002,
1788 "Inside Windows: An In-Depth Look into the Win32 Portable
1789 Executable File Format"
1791 John Levine's book "Linkers and Loaders" contains useful
1796 #if defined(OBJFORMAT_PEi386)
1800 typedef unsigned char UChar;
1801 typedef unsigned short UInt16;
1802 typedef unsigned int UInt32;
1809 UInt16 NumberOfSections;
1810 UInt32 TimeDateStamp;
1811 UInt32 PointerToSymbolTable;
1812 UInt32 NumberOfSymbols;
1813 UInt16 SizeOfOptionalHeader;
1814 UInt16 Characteristics;
1818 #define sizeof_COFF_header 20
1825 UInt32 VirtualAddress;
1826 UInt32 SizeOfRawData;
1827 UInt32 PointerToRawData;
1828 UInt32 PointerToRelocations;
1829 UInt32 PointerToLinenumbers;
1830 UInt16 NumberOfRelocations;
1831 UInt16 NumberOfLineNumbers;
1832 UInt32 Characteristics;
1836 #define sizeof_COFF_section 40
1843 UInt16 SectionNumber;
1846 UChar NumberOfAuxSymbols;
1850 #define sizeof_COFF_symbol 18
1855 UInt32 VirtualAddress;
1856 UInt32 SymbolTableIndex;
1861 #define sizeof_COFF_reloc 10
1864 /* From PE spec doc, section 3.3.2 */
1865 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
1866 windows.h -- for the same purpose, but I want to know what I'm
1868 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
1869 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
1870 #define MYIMAGE_FILE_DLL 0x2000
1871 #define MYIMAGE_FILE_SYSTEM 0x1000
1872 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
1873 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
1874 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
1876 /* From PE spec doc, section 5.4.2 and 5.4.4 */
1877 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
1878 #define MYIMAGE_SYM_CLASS_STATIC 3
1879 #define MYIMAGE_SYM_UNDEFINED 0
1881 /* From PE spec doc, section 4.1 */
1882 #define MYIMAGE_SCN_CNT_CODE 0x00000020
1883 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
1884 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
1886 /* From PE spec doc, section 5.2.1 */
1887 #define MYIMAGE_REL_I386_DIR32 0x0006
1888 #define MYIMAGE_REL_I386_REL32 0x0014
1891 /* We use myindex to calculate array addresses, rather than
1892 simply doing the normal subscript thing. That's because
1893 some of the above structs have sizes which are not
1894 a whole number of words. GCC rounds their sizes up to a
1895 whole number of words, which means that the address calcs
1896 arising from using normal C indexing or pointer arithmetic
1897 are just plain wrong. Sigh.
1900 myindex ( int scale, void* base, int index )
1903 ((UChar*)base) + scale * index;
1908 printName ( UChar* name, UChar* strtab )
1910 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1911 UInt32 strtab_offset = * (UInt32*)(name+4);
1912 debugBelch("%s", strtab + strtab_offset );
1915 for (i = 0; i < 8; i++) {
1916 if (name[i] == 0) break;
1917 debugBelch("%c", name[i] );
1924 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
1926 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1927 UInt32 strtab_offset = * (UInt32*)(name+4);
1928 strncpy ( dst, strtab+strtab_offset, dstSize );
1934 if (name[i] == 0) break;
1944 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
1947 /* If the string is longer than 8 bytes, look in the
1948 string table for it -- this will be correctly zero terminated.
1950 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1951 UInt32 strtab_offset = * (UInt32*)(name+4);
1952 return ((UChar*)strtab) + strtab_offset;
1954 /* Otherwise, if shorter than 8 bytes, return the original,
1955 which by defn is correctly terminated.
1957 if (name[7]==0) return name;
1958 /* The annoying case: 8 bytes. Copy into a temporary
1959 (which is never freed ...)
1961 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
1963 strncpy(newstr,name,8);
1969 /* Just compares the short names (first 8 chars) */
1970 static COFF_section *
1971 findPEi386SectionCalled ( ObjectCode* oc, char* name )
1975 = (COFF_header*)(oc->image);
1976 COFF_section* sectab
1978 ((UChar*)(oc->image))
1979 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
1981 for (i = 0; i < hdr->NumberOfSections; i++) {
1984 COFF_section* section_i
1986 myindex ( sizeof_COFF_section, sectab, i );
1987 n1 = (UChar*) &(section_i->Name);
1989 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
1990 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
1991 n1[6]==n2[6] && n1[7]==n2[7])
2000 zapTrailingAtSign ( UChar* sym )
2002 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2004 if (sym[0] == 0) return;
2006 while (sym[i] != 0) i++;
2009 while (j > 0 && my_isdigit(sym[j])) j--;
2010 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2016 ocVerifyImage_PEi386 ( ObjectCode* oc )
2021 COFF_section* sectab;
2022 COFF_symbol* symtab;
2024 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2025 hdr = (COFF_header*)(oc->image);
2026 sectab = (COFF_section*) (
2027 ((UChar*)(oc->image))
2028 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2030 symtab = (COFF_symbol*) (
2031 ((UChar*)(oc->image))
2032 + hdr->PointerToSymbolTable
2034 strtab = ((UChar*)symtab)
2035 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2037 if (hdr->Machine != 0x14c) {
2038 errorBelch("%s: Not x86 PEi386", oc->fileName);
2041 if (hdr->SizeOfOptionalHeader != 0) {
2042 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2045 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2046 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2047 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2048 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2049 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2052 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2053 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2054 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2056 (int)(hdr->Characteristics));
2059 /* If the string table size is way crazy, this might indicate that
2060 there are more than 64k relocations, despite claims to the
2061 contrary. Hence this test. */
2062 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2064 if ( (*(UInt32*)strtab) > 600000 ) {
2065 /* Note that 600k has no special significance other than being
2066 big enough to handle the almost-2MB-sized lumps that
2067 constitute HSwin32*.o. */
2068 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2073 /* No further verification after this point; only debug printing. */
2075 IF_DEBUG(linker, i=1);
2076 if (i == 0) return 1;
2078 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2079 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2080 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2083 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2084 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2085 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2086 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2087 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2088 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2089 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2091 /* Print the section table. */
2093 for (i = 0; i < hdr->NumberOfSections; i++) {
2095 COFF_section* sectab_i
2097 myindex ( sizeof_COFF_section, sectab, i );
2104 printName ( sectab_i->Name, strtab );
2114 sectab_i->VirtualSize,
2115 sectab_i->VirtualAddress,
2116 sectab_i->SizeOfRawData,
2117 sectab_i->PointerToRawData,
2118 sectab_i->NumberOfRelocations,
2119 sectab_i->PointerToRelocations,
2120 sectab_i->PointerToRawData
2122 reltab = (COFF_reloc*) (
2123 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2126 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2127 /* If the relocation field (a short) has overflowed, the
2128 * real count can be found in the first reloc entry.
2130 * See Section 4.1 (last para) of the PE spec (rev6.0).
2132 COFF_reloc* rel = (COFF_reloc*)
2133 myindex ( sizeof_COFF_reloc, reltab, 0 );
2134 noRelocs = rel->VirtualAddress;
2137 noRelocs = sectab_i->NumberOfRelocations;
2141 for (; j < noRelocs; j++) {
2143 COFF_reloc* rel = (COFF_reloc*)
2144 myindex ( sizeof_COFF_reloc, reltab, j );
2146 " type 0x%-4x vaddr 0x%-8x name `",
2148 rel->VirtualAddress );
2149 sym = (COFF_symbol*)
2150 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2151 /* Hmm..mysterious looking offset - what's it for? SOF */
2152 printName ( sym->Name, strtab -10 );
2159 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2160 debugBelch("---START of string table---\n");
2161 for (i = 4; i < *(Int32*)strtab; i++) {
2163 debugBelch("\n"); else
2164 debugBelch("%c", strtab[i] );
2166 debugBelch("--- END of string table---\n");
2171 COFF_symbol* symtab_i;
2172 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2173 symtab_i = (COFF_symbol*)
2174 myindex ( sizeof_COFF_symbol, symtab, i );
2180 printName ( symtab_i->Name, strtab );
2189 (Int32)(symtab_i->SectionNumber),
2190 (UInt32)symtab_i->Type,
2191 (UInt32)symtab_i->StorageClass,
2192 (UInt32)symtab_i->NumberOfAuxSymbols
2194 i += symtab_i->NumberOfAuxSymbols;
2204 ocGetNames_PEi386 ( ObjectCode* oc )
2207 COFF_section* sectab;
2208 COFF_symbol* symtab;
2215 hdr = (COFF_header*)(oc->image);
2216 sectab = (COFF_section*) (
2217 ((UChar*)(oc->image))
2218 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2220 symtab = (COFF_symbol*) (
2221 ((UChar*)(oc->image))
2222 + hdr->PointerToSymbolTable
2224 strtab = ((UChar*)(oc->image))
2225 + hdr->PointerToSymbolTable
2226 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2228 /* Allocate space for any (local, anonymous) .bss sections. */
2230 for (i = 0; i < hdr->NumberOfSections; i++) {
2233 COFF_section* sectab_i
2235 myindex ( sizeof_COFF_section, sectab, i );
2236 if (0 != strcmp(sectab_i->Name, ".bss")) continue;
2237 /* sof 10/05: the PE spec text isn't too clear regarding what
2238 * the SizeOfRawData field is supposed to hold for object
2239 * file sections containing just uninitialized data -- for executables,
2240 * it is supposed to be zero; unclear what it's supposed to be
2241 * for object files. However, VirtualSize is guaranteed to be
2242 * zero for object files, which definitely suggests that SizeOfRawData
2243 * will be non-zero (where else would the size of this .bss section be
2244 * stored?) Looking at the COFF_section info for incoming object files,
2245 * this certainly appears to be the case.
2247 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2248 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2249 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2250 * variable decls into to the .bss section. (The specific function in Q which
2251 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2253 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2254 /* This is a non-empty .bss section. Allocate zeroed space for
2255 it, and set its PointerToRawData field such that oc->image +
2256 PointerToRawData == addr_of_zeroed_space. */
2257 bss_sz = sectab_i->VirtualSize;
2258 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2259 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2260 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2261 addProddableBlock(oc, zspace, bss_sz);
2262 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2265 /* Copy section information into the ObjectCode. */
2267 for (i = 0; i < hdr->NumberOfSections; i++) {
2273 = SECTIONKIND_OTHER;
2274 COFF_section* sectab_i
2276 myindex ( sizeof_COFF_section, sectab, i );
2277 IF_DEBUG(linker, debugBelch("section name = %s\n", sectab_i->Name ));
2280 /* I'm sure this is the Right Way to do it. However, the
2281 alternative of testing the sectab_i->Name field seems to
2282 work ok with Cygwin.
2284 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
2285 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
2286 kind = SECTIONKIND_CODE_OR_RODATA;
2289 if (0==strcmp(".text",sectab_i->Name) ||
2290 0==strcmp(".rdata",sectab_i->Name)||
2291 0==strcmp(".rodata",sectab_i->Name))
2292 kind = SECTIONKIND_CODE_OR_RODATA;
2293 if (0==strcmp(".data",sectab_i->Name) ||
2294 0==strcmp(".bss",sectab_i->Name))
2295 kind = SECTIONKIND_RWDATA;
2297 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
2298 sz = sectab_i->SizeOfRawData;
2299 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
2301 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
2302 end = start + sz - 1;
2304 if (kind == SECTIONKIND_OTHER
2305 /* Ignore sections called which contain stabs debugging
2307 && 0 != strcmp(".stab", sectab_i->Name)
2308 && 0 != strcmp(".stabstr", sectab_i->Name)
2309 /* ignore constructor section for now */
2310 && 0 != strcmp(".ctors", sectab_i->Name)
2311 /* ignore section generated from .ident */
2312 && 0!= strcmp("/4", sectab_i->Name)
2313 /* ignore unknown section that appeared in gcc 3.4.5(?) */
2314 && 0!= strcmp(".reloc", sectab_i->Name)
2316 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", sectab_i->Name, oc->fileName);
2320 if (kind != SECTIONKIND_OTHER && end >= start) {
2321 addSection(oc, kind, start, end);
2322 addProddableBlock(oc, start, end - start + 1);
2326 /* Copy exported symbols into the ObjectCode. */
2328 oc->n_symbols = hdr->NumberOfSymbols;
2329 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
2330 "ocGetNames_PEi386(oc->symbols)");
2331 /* Call me paranoid; I don't care. */
2332 for (i = 0; i < oc->n_symbols; i++)
2333 oc->symbols[i] = NULL;
2337 COFF_symbol* symtab_i;
2338 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2339 symtab_i = (COFF_symbol*)
2340 myindex ( sizeof_COFF_symbol, symtab, i );
2344 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
2345 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
2346 /* This symbol is global and defined, viz, exported */
2347 /* for MYIMAGE_SYMCLASS_EXTERNAL
2348 && !MYIMAGE_SYM_UNDEFINED,
2349 the address of the symbol is:
2350 address of relevant section + offset in section
2352 COFF_section* sectabent
2353 = (COFF_section*) myindex ( sizeof_COFF_section,
2355 symtab_i->SectionNumber-1 );
2356 addr = ((UChar*)(oc->image))
2357 + (sectabent->PointerToRawData
2361 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
2362 && symtab_i->Value > 0) {
2363 /* This symbol isn't in any section at all, ie, global bss.
2364 Allocate zeroed space for it. */
2365 addr = stgCallocBytes(1, symtab_i->Value,
2366 "ocGetNames_PEi386(non-anonymous bss)");
2367 addSection(oc, SECTIONKIND_RWDATA, addr,
2368 ((UChar*)addr) + symtab_i->Value - 1);
2369 addProddableBlock(oc, addr, symtab_i->Value);
2370 /* debugBelch("BSS section at 0x%x\n", addr); */
2373 if (addr != NULL ) {
2374 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
2375 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
2376 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
2377 ASSERT(i >= 0 && i < oc->n_symbols);
2378 /* cstring_from_COFF_symbol_name always succeeds. */
2379 oc->symbols[i] = sname;
2380 ghciInsertStrHashTable(oc->fileName, symhash, sname, addr);
2384 "IGNORING symbol %d\n"
2388 printName ( symtab_i->Name, strtab );
2397 (Int32)(symtab_i->SectionNumber),
2398 (UInt32)symtab_i->Type,
2399 (UInt32)symtab_i->StorageClass,
2400 (UInt32)symtab_i->NumberOfAuxSymbols
2405 i += symtab_i->NumberOfAuxSymbols;
2414 ocResolve_PEi386 ( ObjectCode* oc )
2417 COFF_section* sectab;
2418 COFF_symbol* symtab;
2428 /* ToDo: should be variable-sized? But is at least safe in the
2429 sense of buffer-overrun-proof. */
2431 /* debugBelch("resolving for %s\n", oc->fileName); */
2433 hdr = (COFF_header*)(oc->image);
2434 sectab = (COFF_section*) (
2435 ((UChar*)(oc->image))
2436 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2438 symtab = (COFF_symbol*) (
2439 ((UChar*)(oc->image))
2440 + hdr->PointerToSymbolTable
2442 strtab = ((UChar*)(oc->image))
2443 + hdr->PointerToSymbolTable
2444 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2446 for (i = 0; i < hdr->NumberOfSections; i++) {
2447 COFF_section* sectab_i
2449 myindex ( sizeof_COFF_section, sectab, i );
2452 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2455 /* Ignore sections called which contain stabs debugging
2457 if (0 == strcmp(".stab", sectab_i->Name)
2458 || 0 == strcmp(".stabstr", sectab_i->Name)
2459 || 0 == strcmp(".ctors", sectab_i->Name))
2462 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2463 /* If the relocation field (a short) has overflowed, the
2464 * real count can be found in the first reloc entry.
2466 * See Section 4.1 (last para) of the PE spec (rev6.0).
2468 * Nov2003 update: the GNU linker still doesn't correctly
2469 * handle the generation of relocatable object files with
2470 * overflown relocations. Hence the output to warn of potential
2473 COFF_reloc* rel = (COFF_reloc*)
2474 myindex ( sizeof_COFF_reloc, reltab, 0 );
2475 noRelocs = rel->VirtualAddress;
2477 /* 10/05: we now assume (and check for) a GNU ld that is capable
2478 * of handling object files with (>2^16) of relocs.
2481 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
2486 noRelocs = sectab_i->NumberOfRelocations;
2491 for (; j < noRelocs; j++) {
2493 COFF_reloc* reltab_j
2495 myindex ( sizeof_COFF_reloc, reltab, j );
2497 /* the location to patch */
2499 ((UChar*)(oc->image))
2500 + (sectab_i->PointerToRawData
2501 + reltab_j->VirtualAddress
2502 - sectab_i->VirtualAddress )
2504 /* the existing contents of pP */
2506 /* the symbol to connect to */
2507 sym = (COFF_symbol*)
2508 myindex ( sizeof_COFF_symbol,
2509 symtab, reltab_j->SymbolTableIndex );
2512 "reloc sec %2d num %3d: type 0x%-4x "
2513 "vaddr 0x%-8x name `",
2515 (UInt32)reltab_j->Type,
2516 reltab_j->VirtualAddress );
2517 printName ( sym->Name, strtab );
2518 debugBelch("'\n" ));
2520 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
2521 COFF_section* section_sym
2522 = findPEi386SectionCalled ( oc, sym->Name );
2524 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
2527 S = ((UInt32)(oc->image))
2528 + (section_sym->PointerToRawData
2531 copyName ( sym->Name, strtab, symbol, 1000-1 );
2532 S = (UInt32) lookupSymbol( symbol );
2533 if ((void*)S != NULL) goto foundit;
2534 zapTrailingAtSign ( symbol );
2535 S = (UInt32) lookupSymbol( symbol );
2536 if ((void*)S != NULL) goto foundit;
2537 /* Newline first because the interactive linker has printed "linking..." */
2538 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, symbol);
2542 checkProddableBlock(oc, pP);
2543 switch (reltab_j->Type) {
2544 case MYIMAGE_REL_I386_DIR32:
2547 case MYIMAGE_REL_I386_REL32:
2548 /* Tricky. We have to insert a displacement at
2549 pP which, when added to the PC for the _next_
2550 insn, gives the address of the target (S).
2551 Problem is to know the address of the next insn
2552 when we only know pP. We assume that this
2553 literal field is always the last in the insn,
2554 so that the address of the next insn is pP+4
2555 -- hence the constant 4.
2556 Also I don't know if A should be added, but so
2557 far it has always been zero.
2559 SOF 05/2005: 'A' (old contents of *pP) have been observed
2560 to contain values other than zero (the 'wx' object file
2561 that came with wxhaskell-0.9.4; dunno how it was compiled..).
2562 So, add displacement to old value instead of asserting
2563 A to be zero. Fixes wxhaskell-related crashes, and no other
2564 ill effects have been observed.
2566 Update: the reason why we're seeing these more elaborate
2567 relocations is due to a switch in how the NCG compiles SRTs
2568 and offsets to them from info tables. SRTs live in .(ro)data,
2569 while info tables live in .text, causing GAS to emit REL32/DISP32
2570 relocations with non-zero values. Adding the displacement is
2571 the right thing to do.
2573 *pP = S - ((UInt32)pP) - 4 + A;
2576 debugBelch("%s: unhandled PEi386 relocation type %d",
2577 oc->fileName, reltab_j->Type);
2584 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
2588 #endif /* defined(OBJFORMAT_PEi386) */
2591 /* --------------------------------------------------------------------------
2593 * ------------------------------------------------------------------------*/
2595 #if defined(OBJFORMAT_ELF)
2600 #if defined(sparc_HOST_ARCH)
2601 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
2602 #elif defined(i386_HOST_ARCH)
2603 # define ELF_TARGET_386 /* Used inside <elf.h> */
2604 #elif defined(x86_64_HOST_ARCH)
2605 # define ELF_TARGET_X64_64
2607 #elif defined (ia64_HOST_ARCH)
2608 # define ELF_TARGET_IA64 /* Used inside <elf.h> */
2610 # define ELF_FUNCTION_DESC /* calling convention uses function descriptors */
2611 # define ELF_NEED_GOT /* needs Global Offset Table */
2612 # define ELF_NEED_PLT /* needs Procedure Linkage Tables */
2615 #if !defined(openbsd_HOST_OS)
2618 /* openbsd elf has things in different places, with diff names */
2619 # include <elf_abi.h>
2620 # include <machine/reloc.h>
2621 # define R_386_32 RELOC_32
2622 # define R_386_PC32 RELOC_PC32
2625 /* If elf.h doesn't define it */
2626 # ifndef R_X86_64_PC64
2627 # define R_X86_64_PC64 24
2631 * Define a set of types which can be used for both ELF32 and ELF64
2635 #define ELFCLASS ELFCLASS64
2636 #define Elf_Addr Elf64_Addr
2637 #define Elf_Word Elf64_Word
2638 #define Elf_Sword Elf64_Sword
2639 #define Elf_Ehdr Elf64_Ehdr
2640 #define Elf_Phdr Elf64_Phdr
2641 #define Elf_Shdr Elf64_Shdr
2642 #define Elf_Sym Elf64_Sym
2643 #define Elf_Rel Elf64_Rel
2644 #define Elf_Rela Elf64_Rela
2645 #define ELF_ST_TYPE ELF64_ST_TYPE
2646 #define ELF_ST_BIND ELF64_ST_BIND
2647 #define ELF_R_TYPE ELF64_R_TYPE
2648 #define ELF_R_SYM ELF64_R_SYM
2650 #define ELFCLASS ELFCLASS32
2651 #define Elf_Addr Elf32_Addr
2652 #define Elf_Word Elf32_Word
2653 #define Elf_Sword Elf32_Sword
2654 #define Elf_Ehdr Elf32_Ehdr
2655 #define Elf_Phdr Elf32_Phdr
2656 #define Elf_Shdr Elf32_Shdr
2657 #define Elf_Sym Elf32_Sym
2658 #define Elf_Rel Elf32_Rel
2659 #define Elf_Rela Elf32_Rela
2661 #define ELF_ST_TYPE ELF32_ST_TYPE
2664 #define ELF_ST_BIND ELF32_ST_BIND
2667 #define ELF_R_TYPE ELF32_R_TYPE
2670 #define ELF_R_SYM ELF32_R_SYM
2676 * Functions to allocate entries in dynamic sections. Currently we simply
2677 * preallocate a large number, and we don't check if a entry for the given
2678 * target already exists (a linear search is too slow). Ideally these
2679 * entries would be associated with symbols.
2682 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
2683 #define GOT_SIZE 0x20000
2684 #define FUNCTION_TABLE_SIZE 0x10000
2685 #define PLT_SIZE 0x08000
2688 static Elf_Addr got[GOT_SIZE];
2689 static unsigned int gotIndex;
2690 static Elf_Addr gp_val = (Elf_Addr)got;
2693 allocateGOTEntry(Elf_Addr target)
2697 if (gotIndex >= GOT_SIZE)
2698 barf("Global offset table overflow");
2700 entry = &got[gotIndex++];
2702 return (Elf_Addr)entry;
2706 #ifdef ELF_FUNCTION_DESC
2712 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
2713 static unsigned int functionTableIndex;
2716 allocateFunctionDesc(Elf_Addr target)
2718 FunctionDesc *entry;
2720 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
2721 barf("Function table overflow");
2723 entry = &functionTable[functionTableIndex++];
2725 entry->gp = (Elf_Addr)gp_val;
2726 return (Elf_Addr)entry;
2730 copyFunctionDesc(Elf_Addr target)
2732 FunctionDesc *olddesc = (FunctionDesc *)target;
2733 FunctionDesc *newdesc;
2735 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
2736 newdesc->gp = olddesc->gp;
2737 return (Elf_Addr)newdesc;
2742 #ifdef ia64_HOST_ARCH
2743 static void ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value);
2744 static void ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc);
2746 static unsigned char plt_code[] =
2748 /* taken from binutils bfd/elfxx-ia64.c */
2749 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */
2750 0x00, 0x41, 0x3c, 0x30, 0x28, 0xc0, /* ld8 r16=[r15],8 */
2751 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */
2752 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */
2753 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
2754 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
2757 /* If we can't get to the function descriptor via gp, take a local copy of it */
2758 #define PLT_RELOC(code, target) { \
2759 Elf64_Sxword rel_value = target - gp_val; \
2760 if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff)) \
2761 ia64_reloc_gprel22((Elf_Addr)code, copyFunctionDesc(target)); \
2763 ia64_reloc_gprel22((Elf_Addr)code, target); \
2768 unsigned char code[sizeof(plt_code)];
2772 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
2774 PLTEntry *plt = (PLTEntry *)oc->plt;
2777 if (oc->pltIndex >= PLT_SIZE)
2778 barf("Procedure table overflow");
2780 entry = &plt[oc->pltIndex++];
2781 memcpy(entry->code, plt_code, sizeof(entry->code));
2782 PLT_RELOC(entry->code, target);
2783 return (Elf_Addr)entry;
2789 return (PLT_SIZE * sizeof(PLTEntry));
2795 * Generic ELF functions
2799 findElfSection ( void* objImage, Elf_Word sh_type )
2801 char* ehdrC = (char*)objImage;
2802 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2803 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
2804 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
2808 for (i = 0; i < ehdr->e_shnum; i++) {
2809 if (shdr[i].sh_type == sh_type
2810 /* Ignore the section header's string table. */
2811 && i != ehdr->e_shstrndx
2812 /* Ignore string tables named .stabstr, as they contain
2814 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
2816 ptr = ehdrC + shdr[i].sh_offset;
2823 #if defined(ia64_HOST_ARCH)
2825 findElfSegment ( void* objImage, Elf_Addr vaddr )
2827 char* ehdrC = (char*)objImage;
2828 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2829 Elf_Phdr* phdr = (Elf_Phdr*)(ehdrC + ehdr->e_phoff);
2830 Elf_Addr segaddr = 0;
2833 for (i = 0; i < ehdr->e_phnum; i++) {
2834 segaddr = phdr[i].p_vaddr;
2835 if ((vaddr >= segaddr) && (vaddr < segaddr + phdr[i].p_memsz))
2843 ocVerifyImage_ELF ( ObjectCode* oc )
2847 int i, j, nent, nstrtab, nsymtabs;
2851 char* ehdrC = (char*)(oc->image);
2852 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2854 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
2855 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
2856 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
2857 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
2858 errorBelch("%s: not an ELF object", oc->fileName);
2862 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
2863 errorBelch("%s: unsupported ELF format", oc->fileName);
2867 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
2868 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
2870 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
2871 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
2873 errorBelch("%s: unknown endiannness", oc->fileName);
2877 if (ehdr->e_type != ET_REL) {
2878 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
2881 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
2883 IF_DEBUG(linker,debugBelch( "Architecture is " ));
2884 switch (ehdr->e_machine) {
2885 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
2886 #ifdef EM_SPARC32PLUS
2887 case EM_SPARC32PLUS:
2889 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
2891 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
2893 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
2895 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
2896 #elif defined(EM_AMD64)
2897 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
2899 default: IF_DEBUG(linker,debugBelch( "unknown" ));
2900 errorBelch("%s: unknown architecture (e_machine == %d)"
2901 , oc->fileName, ehdr->e_machine);
2905 IF_DEBUG(linker,debugBelch(
2906 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
2907 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
2909 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
2911 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
2913 if (ehdr->e_shstrndx == SHN_UNDEF) {
2914 errorBelch("%s: no section header string table", oc->fileName);
2917 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
2919 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
2922 for (i = 0; i < ehdr->e_shnum; i++) {
2923 IF_DEBUG(linker,debugBelch("%2d: ", i ));
2924 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
2925 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
2926 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
2927 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
2928 ehdrC + shdr[i].sh_offset,
2929 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
2931 if (shdr[i].sh_type == SHT_REL) {
2932 IF_DEBUG(linker,debugBelch("Rel " ));
2933 } else if (shdr[i].sh_type == SHT_RELA) {
2934 IF_DEBUG(linker,debugBelch("RelA " ));
2936 IF_DEBUG(linker,debugBelch(" "));
2939 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
2943 IF_DEBUG(linker,debugBelch( "\nString tables" ));
2946 for (i = 0; i < ehdr->e_shnum; i++) {
2947 if (shdr[i].sh_type == SHT_STRTAB
2948 /* Ignore the section header's string table. */
2949 && i != ehdr->e_shstrndx
2950 /* Ignore string tables named .stabstr, as they contain
2952 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
2954 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
2955 strtab = ehdrC + shdr[i].sh_offset;
2960 errorBelch("%s: no string tables, or too many", oc->fileName);
2965 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
2966 for (i = 0; i < ehdr->e_shnum; i++) {
2967 if (shdr[i].sh_type != SHT_SYMTAB) continue;
2968 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
2970 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
2971 nent = shdr[i].sh_size / sizeof(Elf_Sym);
2972 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
2974 (long)shdr[i].sh_size % sizeof(Elf_Sym)
2976 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
2977 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
2980 for (j = 0; j < nent; j++) {
2981 IF_DEBUG(linker,debugBelch(" %2d ", j ));
2982 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
2983 (int)stab[j].st_shndx,
2984 (int)stab[j].st_size,
2985 (char*)stab[j].st_value ));
2987 IF_DEBUG(linker,debugBelch("type=" ));
2988 switch (ELF_ST_TYPE(stab[j].st_info)) {
2989 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
2990 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
2991 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
2992 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
2993 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
2994 default: IF_DEBUG(linker,debugBelch("? " )); break;
2996 IF_DEBUG(linker,debugBelch(" " ));
2998 IF_DEBUG(linker,debugBelch("bind=" ));
2999 switch (ELF_ST_BIND(stab[j].st_info)) {
3000 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3001 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3002 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3003 default: IF_DEBUG(linker,debugBelch("? " )); break;
3005 IF_DEBUG(linker,debugBelch(" " ));
3007 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3011 if (nsymtabs == 0) {
3012 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3019 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3023 if (hdr->sh_type == SHT_PROGBITS
3024 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3025 /* .text-style section */
3026 return SECTIONKIND_CODE_OR_RODATA;
3029 if (hdr->sh_type == SHT_PROGBITS
3030 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3031 /* .data-style section */
3032 return SECTIONKIND_RWDATA;
3035 if (hdr->sh_type == SHT_PROGBITS
3036 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3037 /* .rodata-style section */
3038 return SECTIONKIND_CODE_OR_RODATA;
3041 if (hdr->sh_type == SHT_NOBITS
3042 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3043 /* .bss-style section */
3045 return SECTIONKIND_RWDATA;
3048 return SECTIONKIND_OTHER;
3053 ocGetNames_ELF ( ObjectCode* oc )
3058 char* ehdrC = (char*)(oc->image);
3059 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3060 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3061 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3063 ASSERT(symhash != NULL);
3066 errorBelch("%s: no strtab", oc->fileName);
3071 for (i = 0; i < ehdr->e_shnum; i++) {
3072 /* Figure out what kind of section it is. Logic derived from
3073 Figure 1.14 ("Special Sections") of the ELF document
3074 ("Portable Formats Specification, Version 1.1"). */
3076 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3078 if (is_bss && shdr[i].sh_size > 0) {
3079 /* This is a non-empty .bss section. Allocate zeroed space for
3080 it, and set its .sh_offset field such that
3081 ehdrC + .sh_offset == addr_of_zeroed_space. */
3082 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3083 "ocGetNames_ELF(BSS)");
3084 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3086 debugBelch("BSS section at 0x%x, size %d\n",
3087 zspace, shdr[i].sh_size);
3091 /* fill in the section info */
3092 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3093 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3094 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3095 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3098 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3100 /* copy stuff into this module's object symbol table */
3101 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3102 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3104 oc->n_symbols = nent;
3105 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3106 "ocGetNames_ELF(oc->symbols)");
3108 for (j = 0; j < nent; j++) {
3110 char isLocal = FALSE; /* avoids uninit-var warning */
3112 char* nm = strtab + stab[j].st_name;
3113 int secno = stab[j].st_shndx;
3115 /* Figure out if we want to add it; if so, set ad to its
3116 address. Otherwise leave ad == NULL. */
3118 if (secno == SHN_COMMON) {
3120 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3122 debugBelch("COMMON symbol, size %d name %s\n",
3123 stab[j].st_size, nm);
3125 /* Pointless to do addProddableBlock() for this area,
3126 since the linker should never poke around in it. */
3129 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3130 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3132 /* and not an undefined symbol */
3133 && stab[j].st_shndx != SHN_UNDEF
3134 /* and not in a "special section" */
3135 && stab[j].st_shndx < SHN_LORESERVE
3137 /* and it's a not a section or string table or anything silly */
3138 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3139 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3140 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3143 /* Section 0 is the undefined section, hence > and not >=. */
3144 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3146 if (shdr[secno].sh_type == SHT_NOBITS) {
3147 debugBelch(" BSS symbol, size %d off %d name %s\n",
3148 stab[j].st_size, stab[j].st_value, nm);
3151 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3152 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3155 #ifdef ELF_FUNCTION_DESC
3156 /* dlsym() and the initialisation table both give us function
3157 * descriptors, so to be consistent we store function descriptors
3158 * in the symbol table */
3159 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3160 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3162 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3163 ad, oc->fileName, nm ));
3168 /* And the decision is ... */
3172 oc->symbols[j] = nm;
3175 /* Ignore entirely. */
3177 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3181 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3182 strtab + stab[j].st_name ));
3185 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3186 (int)ELF_ST_BIND(stab[j].st_info),
3187 (int)ELF_ST_TYPE(stab[j].st_info),
3188 (int)stab[j].st_shndx,
3189 strtab + stab[j].st_name
3192 oc->symbols[j] = NULL;
3201 /* Do ELF relocations which lack an explicit addend. All x86-linux
3202 relocations appear to be of this form. */
3204 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3205 Elf_Shdr* shdr, int shnum,
3206 Elf_Sym* stab, char* strtab )
3211 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3212 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3213 int target_shndx = shdr[shnum].sh_info;
3214 int symtab_shndx = shdr[shnum].sh_link;
3216 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3217 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3218 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3219 target_shndx, symtab_shndx ));
3221 /* Skip sections that we're not interested in. */
3224 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3225 if (kind == SECTIONKIND_OTHER) {
3226 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3231 for (j = 0; j < nent; j++) {
3232 Elf_Addr offset = rtab[j].r_offset;
3233 Elf_Addr info = rtab[j].r_info;
3235 Elf_Addr P = ((Elf_Addr)targ) + offset;
3236 Elf_Word* pP = (Elf_Word*)P;
3241 StgStablePtr stablePtr;
3244 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3245 j, (void*)offset, (void*)info ));
3247 IF_DEBUG(linker,debugBelch( " ZERO" ));
3250 Elf_Sym sym = stab[ELF_R_SYM(info)];
3251 /* First see if it is a local symbol. */
3252 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3253 /* Yes, so we can get the address directly from the ELF symbol
3255 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3257 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3258 + stab[ELF_R_SYM(info)].st_value);
3261 symbol = strtab + sym.st_name;
3262 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3263 if (NULL == stablePtr) {
3264 /* No, so look up the name in our global table. */
3265 S_tmp = lookupSymbol( symbol );
3266 S = (Elf_Addr)S_tmp;
3268 stableVal = deRefStablePtr( stablePtr );
3270 S = (Elf_Addr)S_tmp;
3274 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3277 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3280 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3281 (void*)P, (void*)S, (void*)A ));
3282 checkProddableBlock ( oc, pP );
3286 switch (ELF_R_TYPE(info)) {
3287 # ifdef i386_HOST_ARCH
3288 case R_386_32: *pP = value; break;
3289 case R_386_PC32: *pP = value - P; break;
3292 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3293 oc->fileName, (lnat)ELF_R_TYPE(info));
3301 /* Do ELF relocations for which explicit addends are supplied.
3302 sparc-solaris relocations appear to be of this form. */
3304 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
3305 Elf_Shdr* shdr, int shnum,
3306 Elf_Sym* stab, char* strtab )
3309 char *symbol = NULL;
3311 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
3312 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
3313 int target_shndx = shdr[shnum].sh_info;
3314 int symtab_shndx = shdr[shnum].sh_link;
3316 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3317 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
3318 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3319 target_shndx, symtab_shndx ));
3321 for (j = 0; j < nent; j++) {
3322 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3323 /* This #ifdef only serves to avoid unused-var warnings. */
3324 Elf_Addr offset = rtab[j].r_offset;
3325 Elf_Addr P = targ + offset;
3327 Elf_Addr info = rtab[j].r_info;
3328 Elf_Addr A = rtab[j].r_addend;
3332 # if defined(sparc_HOST_ARCH)
3333 Elf_Word* pP = (Elf_Word*)P;
3335 # elif defined(ia64_HOST_ARCH)
3336 Elf64_Xword *pP = (Elf64_Xword *)P;
3338 # elif defined(powerpc_HOST_ARCH)
3342 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
3343 j, (void*)offset, (void*)info,
3346 IF_DEBUG(linker,debugBelch( " ZERO" ));
3349 Elf_Sym sym = stab[ELF_R_SYM(info)];
3350 /* First see if it is a local symbol. */
3351 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3352 /* Yes, so we can get the address directly from the ELF symbol
3354 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3356 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3357 + stab[ELF_R_SYM(info)].st_value);
3358 #ifdef ELF_FUNCTION_DESC
3359 /* Make a function descriptor for this function */
3360 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
3361 S = allocateFunctionDesc(S + A);
3366 /* No, so look up the name in our global table. */
3367 symbol = strtab + sym.st_name;
3368 S_tmp = lookupSymbol( symbol );
3369 S = (Elf_Addr)S_tmp;
3371 #ifdef ELF_FUNCTION_DESC
3372 /* If a function, already a function descriptor - we would
3373 have to copy it to add an offset. */
3374 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
3375 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
3379 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3382 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
3385 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
3386 (void*)P, (void*)S, (void*)A ));
3387 /* checkProddableBlock ( oc, (void*)P ); */
3391 switch (ELF_R_TYPE(info)) {
3392 # if defined(sparc_HOST_ARCH)
3393 case R_SPARC_WDISP30:
3394 w1 = *pP & 0xC0000000;
3395 w2 = (Elf_Word)((value - P) >> 2);
3396 ASSERT((w2 & 0xC0000000) == 0);
3401 w1 = *pP & 0xFFC00000;
3402 w2 = (Elf_Word)(value >> 10);
3403 ASSERT((w2 & 0xFFC00000) == 0);
3409 w2 = (Elf_Word)(value & 0x3FF);
3410 ASSERT((w2 & ~0x3FF) == 0);
3414 /* According to the Sun documentation:
3416 This relocation type resembles R_SPARC_32, except it refers to an
3417 unaligned word. That is, the word to be relocated must be treated
3418 as four separate bytes with arbitrary alignment, not as a word
3419 aligned according to the architecture requirements.
3421 (JRS: which means that freeloading on the R_SPARC_32 case
3422 is probably wrong, but hey ...)
3426 w2 = (Elf_Word)value;
3429 # elif defined(ia64_HOST_ARCH)
3430 case R_IA64_DIR64LSB:
3431 case R_IA64_FPTR64LSB:
3434 case R_IA64_PCREL64LSB:
3437 case R_IA64_SEGREL64LSB:
3438 addr = findElfSegment(ehdrC, value);
3441 case R_IA64_GPREL22:
3442 ia64_reloc_gprel22(P, value);
3444 case R_IA64_LTOFF22:
3445 case R_IA64_LTOFF22X:
3446 case R_IA64_LTOFF_FPTR22:
3447 addr = allocateGOTEntry(value);
3448 ia64_reloc_gprel22(P, addr);
3450 case R_IA64_PCREL21B:
3451 ia64_reloc_pcrel21(P, S, oc);
3454 /* This goes with R_IA64_LTOFF22X and points to the load to
3455 * convert into a move. We don't implement relaxation. */
3457 # elif defined(powerpc_HOST_ARCH)
3458 case R_PPC_ADDR16_LO:
3459 *(Elf32_Half*) P = value;
3462 case R_PPC_ADDR16_HI:
3463 *(Elf32_Half*) P = value >> 16;
3466 case R_PPC_ADDR16_HA:
3467 *(Elf32_Half*) P = (value + 0x8000) >> 16;
3471 *(Elf32_Word *) P = value;
3475 *(Elf32_Word *) P = value - P;
3481 if( delta << 6 >> 6 != delta )
3483 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
3487 if( value == 0 || delta << 6 >> 6 != delta )
3489 barf( "Unable to make SymbolExtra for #%d",
3495 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
3496 | (delta & 0x3fffffc);
3500 #if x86_64_HOST_ARCH
3502 *(Elf64_Xword *)P = value;
3507 StgInt64 off = value - P;
3508 if (off >= 0x7fffffffL || off < -0x80000000L) {
3509 #if X86_64_ELF_NONPIC_HACK
3510 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3512 off = pltAddress + A - P;
3514 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3515 symbol, off, oc->fileName );
3518 *(Elf64_Word *)P = (Elf64_Word)off;
3524 StgInt64 off = value - P;
3525 *(Elf64_Word *)P = (Elf64_Word)off;
3530 if (value >= 0x7fffffffL) {
3531 #if X86_64_ELF_NONPIC_HACK
3532 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3534 value = pltAddress + A;
3536 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3537 symbol, value, oc->fileName );
3540 *(Elf64_Word *)P = (Elf64_Word)value;
3544 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
3545 #if X86_64_ELF_NONPIC_HACK
3546 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3548 value = pltAddress + A;
3550 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3551 symbol, value, oc->fileName );
3554 *(Elf64_Sword *)P = (Elf64_Sword)value;
3557 case R_X86_64_GOTPCREL:
3559 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
3560 StgInt64 off = gotAddress + A - P;
3561 *(Elf64_Word *)P = (Elf64_Word)off;
3565 case R_X86_64_PLT32:
3567 StgInt64 off = value - P;
3568 if (off >= 0x7fffffffL || off < -0x80000000L) {
3569 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3571 off = pltAddress + A - P;
3573 *(Elf64_Word *)P = (Elf64_Word)off;
3579 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
3580 oc->fileName, (lnat)ELF_R_TYPE(info));
3589 ocResolve_ELF ( ObjectCode* oc )
3593 Elf_Sym* stab = NULL;
3594 char* ehdrC = (char*)(oc->image);
3595 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
3596 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3598 /* first find "the" symbol table */
3599 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
3601 /* also go find the string table */
3602 strtab = findElfSection ( ehdrC, SHT_STRTAB );
3604 if (stab == NULL || strtab == NULL) {
3605 errorBelch("%s: can't find string or symbol table", oc->fileName);
3609 /* Process the relocation sections. */
3610 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
3611 if (shdr[shnum].sh_type == SHT_REL) {
3612 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
3613 shnum, stab, strtab );
3617 if (shdr[shnum].sh_type == SHT_RELA) {
3618 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
3619 shnum, stab, strtab );
3624 #if defined(powerpc_HOST_ARCH)
3625 ocFlushInstructionCache( oc );
3633 * Instructions are 41 bits long, packed into 128 bit bundles with a 5-bit template
3634 * at the front. The following utility functions pack and unpack instructions, and
3635 * take care of the most common relocations.
3638 #ifdef ia64_HOST_ARCH
3641 ia64_extract_instruction(Elf64_Xword *target)
3644 int slot = (Elf_Addr)target & 3;
3645 target = (Elf_Addr)target & ~3;
3653 return ((w1 >> 5) & 0x1ffffffffff);
3655 return (w1 >> 46) | ((w2 & 0x7fffff) << 18);
3659 barf("ia64_extract_instruction: invalid slot %p", target);
3664 ia64_deposit_instruction(Elf64_Xword *target, Elf64_Xword value)
3666 int slot = (Elf_Addr)target & 3;
3667 target = (Elf_Addr)target & ~3;
3672 *target |= value << 5;
3675 *target |= value << 46;
3676 *(target+1) |= value >> 18;
3679 *(target+1) |= value << 23;
3685 ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value)
3687 Elf64_Xword instruction;
3688 Elf64_Sxword rel_value;
3690 rel_value = value - gp_val;
3691 if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff))
3692 barf("GP-relative data out of range (address = 0x%lx, gp = 0x%lx)", value, gp_val);
3694 instruction = ia64_extract_instruction((Elf64_Xword *)target);
3695 instruction |= (((rel_value >> 0) & 0x07f) << 13) /* imm7b */
3696 | (((rel_value >> 7) & 0x1ff) << 27) /* imm9d */
3697 | (((rel_value >> 16) & 0x01f) << 22) /* imm5c */
3698 | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
3699 ia64_deposit_instruction((Elf64_Xword *)target, instruction);
3703 ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc)
3705 Elf64_Xword instruction;
3706 Elf64_Sxword rel_value;
3709 entry = allocatePLTEntry(value, oc);
3711 rel_value = (entry >> 4) - (target >> 4);
3712 if ((rel_value > 0xfffff) || (rel_value < -0xfffff))
3713 barf("PLT entry too far away (entry = 0x%lx, target = 0x%lx)", entry, target);
3715 instruction = ia64_extract_instruction((Elf64_Xword *)target);
3716 instruction |= ((rel_value & 0xfffff) << 13) /* imm20b */
3717 | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
3718 ia64_deposit_instruction((Elf64_Xword *)target, instruction);
3724 * PowerPC & X86_64 ELF specifics
3727 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3729 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
3735 ehdr = (Elf_Ehdr *) oc->image;
3736 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
3738 for( i = 0; i < ehdr->e_shnum; i++ )
3739 if( shdr[i].sh_type == SHT_SYMTAB )
3742 if( i == ehdr->e_shnum )
3744 errorBelch( "This ELF file contains no symtab" );
3748 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
3750 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
3751 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
3756 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
3759 #endif /* powerpc */
3763 /* --------------------------------------------------------------------------
3765 * ------------------------------------------------------------------------*/
3767 #if defined(OBJFORMAT_MACHO)
3770 Support for MachO linking on Darwin/MacOS X
3771 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
3773 I hereby formally apologize for the hackish nature of this code.
3774 Things that need to be done:
3775 *) implement ocVerifyImage_MachO
3776 *) add still more sanity checks.
3779 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
3780 #define mach_header mach_header_64
3781 #define segment_command segment_command_64
3782 #define section section_64
3783 #define nlist nlist_64
3786 #ifdef powerpc_HOST_ARCH
3787 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
3789 struct mach_header *header = (struct mach_header *) oc->image;
3790 struct load_command *lc = (struct load_command *) (header + 1);
3793 for( i = 0; i < header->ncmds; i++ )
3795 if( lc->cmd == LC_SYMTAB )
3797 // Find out the first and last undefined external
3798 // symbol, so we don't have to allocate too many
3800 struct symtab_command *symLC = (struct symtab_command *) lc;
3801 unsigned min = symLC->nsyms, max = 0;
3802 struct nlist *nlist =
3803 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
3805 for(i=0;i<symLC->nsyms;i++)
3807 if(nlist[i].n_type & N_STAB)
3809 else if(nlist[i].n_type & N_EXT)
3811 if((nlist[i].n_type & N_TYPE) == N_UNDF
3812 && (nlist[i].n_value == 0))
3822 return ocAllocateSymbolExtras(oc, max - min + 1, min);
3827 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
3829 return ocAllocateSymbolExtras(oc,0,0);
3832 #ifdef x86_64_HOST_ARCH
3833 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
3835 struct mach_header *header = (struct mach_header *) oc->image;
3836 struct load_command *lc = (struct load_command *) (header + 1);
3839 for( i = 0; i < header->ncmds; i++ )
3841 if( lc->cmd == LC_SYMTAB )
3843 // Just allocate one entry for every symbol
3844 struct symtab_command *symLC = (struct symtab_command *) lc;
3846 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
3849 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
3851 return ocAllocateSymbolExtras(oc,0,0);
3855 static int ocVerifyImage_MachO(ObjectCode* oc)
3857 char *image = (char*) oc->image;
3858 struct mach_header *header = (struct mach_header*) image;
3860 #if x86_64_TARGET_ARCH || powerpc64_TARGET_ARCH
3861 if(header->magic != MH_MAGIC_64)
3864 if(header->magic != MH_MAGIC)
3867 // FIXME: do some more verifying here
3871 static int resolveImports(
3874 struct symtab_command *symLC,
3875 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
3876 unsigned long *indirectSyms,
3877 struct nlist *nlist)
3880 size_t itemSize = 4;
3883 int isJumpTable = 0;
3884 if(!strcmp(sect->sectname,"__jump_table"))
3888 ASSERT(sect->reserved2 == itemSize);
3892 for(i=0; i*itemSize < sect->size;i++)
3894 // according to otool, reserved1 contains the first index into the indirect symbol table
3895 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
3896 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
3899 if((symbol->n_type & N_TYPE) == N_UNDF
3900 && (symbol->n_type & N_EXT) && (symbol->n_value != 0))
3901 addr = (void*) (symbol->n_value);
3903 addr = lookupSymbol(nm);
3906 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
3914 checkProddableBlock(oc,image + sect->offset + i*itemSize);
3915 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
3916 *(unsigned*)(image + sect->offset + i*itemSize + 1)
3917 = (char*)addr - (image + sect->offset + i*itemSize + 5);
3922 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
3923 ((void**)(image + sect->offset))[i] = addr;
3930 static unsigned long relocateAddress(
3933 struct section* sections,
3934 unsigned long address)
3937 for(i = 0; i < nSections; i++)
3939 if(sections[i].addr <= address
3940 && address < sections[i].addr + sections[i].size)
3942 return (unsigned long)oc->image
3943 + sections[i].offset + address - sections[i].addr;
3946 barf("Invalid Mach-O file:"
3947 "Address out of bounds while relocating object file");
3951 static int relocateSection(
3954 struct symtab_command *symLC, struct nlist *nlist,
3955 int nSections, struct section* sections, struct section *sect)
3957 struct relocation_info *relocs;
3960 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
3962 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
3964 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
3966 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
3970 relocs = (struct relocation_info*) (image + sect->reloff);
3974 #ifdef x86_64_HOST_ARCH
3975 struct relocation_info *reloc = &relocs[i];
3977 char *thingPtr = image + sect->offset + reloc->r_address;
3981 int type = reloc->r_type;
3983 checkProddableBlock(oc,thingPtr);
3984 switch(reloc->r_length)
3987 thing = *(uint8_t*)thingPtr;
3988 baseValue = (uint64_t)thingPtr + 1;
3991 thing = *(uint16_t*)thingPtr;
3992 baseValue = (uint64_t)thingPtr + 2;
3995 thing = *(uint32_t*)thingPtr;
3996 baseValue = (uint64_t)thingPtr + 4;
3999 thing = *(uint64_t*)thingPtr;
4000 baseValue = (uint64_t)thingPtr + 8;
4003 barf("Unknown size.");
4006 if(type == X86_64_RELOC_GOT
4007 || type == X86_64_RELOC_GOT_LOAD)
4009 ASSERT(reloc->r_extern);
4010 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)->addr;
4012 type = X86_64_RELOC_SIGNED;
4014 else if(reloc->r_extern)
4016 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4017 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4018 if(symbol->n_value == 0)
4019 value = (uint64_t) lookupSymbol(nm);
4021 value = relocateAddress(oc, nSections, sections,
4026 value = sections[reloc->r_symbolnum-1].offset
4027 - sections[reloc->r_symbolnum-1].addr
4031 if(type == X86_64_RELOC_BRANCH)
4033 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4035 ASSERT(reloc->r_extern);
4036 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4039 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4040 type = X86_64_RELOC_SIGNED;
4045 case X86_64_RELOC_UNSIGNED:
4046 ASSERT(!reloc->r_pcrel);
4049 case X86_64_RELOC_SIGNED:
4050 ASSERT(reloc->r_pcrel);
4051 thing += value - baseValue;
4053 case X86_64_RELOC_SUBTRACTOR:
4054 ASSERT(!reloc->r_pcrel);
4058 barf("unkown relocation");
4061 switch(reloc->r_length)
4064 *(uint8_t*)thingPtr = thing;
4067 *(uint16_t*)thingPtr = thing;
4070 *(uint32_t*)thingPtr = thing;
4073 *(uint64_t*)thingPtr = thing;
4077 if(relocs[i].r_address & R_SCATTERED)
4079 struct scattered_relocation_info *scat =
4080 (struct scattered_relocation_info*) &relocs[i];
4084 if(scat->r_length == 2)
4086 unsigned long word = 0;
4087 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4088 checkProddableBlock(oc,wordPtr);
4090 // Note on relocation types:
4091 // i386 uses the GENERIC_RELOC_* types,
4092 // while ppc uses special PPC_RELOC_* types.
4093 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4094 // in both cases, all others are different.
4095 // Therefore, we use GENERIC_RELOC_VANILLA
4096 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4097 // and use #ifdefs for the other types.
4099 // Step 1: Figure out what the relocated value should be
4100 if(scat->r_type == GENERIC_RELOC_VANILLA)
4102 word = *wordPtr + (unsigned long) relocateAddress(
4109 #ifdef powerpc_HOST_ARCH
4110 else if(scat->r_type == PPC_RELOC_SECTDIFF
4111 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4112 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4113 || scat->r_type == PPC_RELOC_HA16_SECTDIFF)
4115 else if(scat->r_type == GENERIC_RELOC_SECTDIFF)
4118 struct scattered_relocation_info *pair =
4119 (struct scattered_relocation_info*) &relocs[i+1];
4121 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4122 barf("Invalid Mach-O file: "
4123 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4125 word = (unsigned long)
4126 (relocateAddress(oc, nSections, sections, scat->r_value)
4127 - relocateAddress(oc, nSections, sections, pair->r_value));
4130 #ifdef powerpc_HOST_ARCH
4131 else if(scat->r_type == PPC_RELOC_HI16
4132 || scat->r_type == PPC_RELOC_LO16
4133 || scat->r_type == PPC_RELOC_HA16
4134 || scat->r_type == PPC_RELOC_LO14)
4135 { // these are generated by label+offset things
4136 struct relocation_info *pair = &relocs[i+1];
4137 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4138 barf("Invalid Mach-O file: "
4139 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4141 if(scat->r_type == PPC_RELOC_LO16)
4143 word = ((unsigned short*) wordPtr)[1];
4144 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4146 else if(scat->r_type == PPC_RELOC_LO14)
4148 barf("Unsupported Relocation: PPC_RELOC_LO14");
4149 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4150 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4152 else if(scat->r_type == PPC_RELOC_HI16)
4154 word = ((unsigned short*) wordPtr)[1] << 16;
4155 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4157 else if(scat->r_type == PPC_RELOC_HA16)
4159 word = ((unsigned short*) wordPtr)[1] << 16;
4160 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4164 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4171 continue; // ignore the others
4173 #ifdef powerpc_HOST_ARCH
4174 if(scat->r_type == GENERIC_RELOC_VANILLA
4175 || scat->r_type == PPC_RELOC_SECTDIFF)
4177 if(scat->r_type == GENERIC_RELOC_VANILLA
4178 || scat->r_type == GENERIC_RELOC_SECTDIFF)
4183 #ifdef powerpc_HOST_ARCH
4184 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4186 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4188 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4190 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4192 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4194 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4195 + ((word & (1<<15)) ? 1 : 0);
4201 continue; // FIXME: I hope it's OK to ignore all the others.
4205 struct relocation_info *reloc = &relocs[i];
4206 if(reloc->r_pcrel && !reloc->r_extern)
4209 if(reloc->r_length == 2)
4211 unsigned long word = 0;
4212 #ifdef powerpc_HOST_ARCH
4213 unsigned long jumpIsland = 0;
4214 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4215 // to avoid warning and to catch
4219 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4220 checkProddableBlock(oc,wordPtr);
4222 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4226 #ifdef powerpc_HOST_ARCH
4227 else if(reloc->r_type == PPC_RELOC_LO16)
4229 word = ((unsigned short*) wordPtr)[1];
4230 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4232 else if(reloc->r_type == PPC_RELOC_HI16)
4234 word = ((unsigned short*) wordPtr)[1] << 16;
4235 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4237 else if(reloc->r_type == PPC_RELOC_HA16)
4239 word = ((unsigned short*) wordPtr)[1] << 16;
4240 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4242 else if(reloc->r_type == PPC_RELOC_BR24)
4245 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4249 if(!reloc->r_extern)
4252 sections[reloc->r_symbolnum-1].offset
4253 - sections[reloc->r_symbolnum-1].addr
4260 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4261 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4262 void *symbolAddress = lookupSymbol(nm);
4265 errorBelch("\nunknown symbol `%s'", nm);
4271 #ifdef powerpc_HOST_ARCH
4272 // In the .o file, this should be a relative jump to NULL
4273 // and we'll change it to a relative jump to the symbol
4274 ASSERT(word + reloc->r_address == 0);
4275 jumpIsland = (unsigned long)
4276 &makeSymbolExtra(oc,
4278 (unsigned long) symbolAddress)
4282 offsetToJumpIsland = word + jumpIsland
4283 - (((long)image) + sect->offset - sect->addr);
4286 word += (unsigned long) symbolAddress
4287 - (((long)image) + sect->offset - sect->addr);
4291 word += (unsigned long) symbolAddress;
4295 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4300 #ifdef powerpc_HOST_ARCH
4301 else if(reloc->r_type == PPC_RELOC_LO16)
4303 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4306 else if(reloc->r_type == PPC_RELOC_HI16)
4308 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4311 else if(reloc->r_type == PPC_RELOC_HA16)
4313 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4314 + ((word & (1<<15)) ? 1 : 0);
4317 else if(reloc->r_type == PPC_RELOC_BR24)
4319 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4321 // The branch offset is too large.
4322 // Therefore, we try to use a jump island.
4325 barf("unconditional relative branch out of range: "
4326 "no jump island available");
4329 word = offsetToJumpIsland;
4330 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4331 barf("unconditional relative branch out of range: "
4332 "jump island out of range");
4334 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
4339 barf("\nunknown relocation %d",reloc->r_type);
4347 static int ocGetNames_MachO(ObjectCode* oc)
4349 char *image = (char*) oc->image;
4350 struct mach_header *header = (struct mach_header*) image;
4351 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4352 unsigned i,curSymbol = 0;
4353 struct segment_command *segLC = NULL;
4354 struct section *sections;
4355 struct symtab_command *symLC = NULL;
4356 struct nlist *nlist;
4357 unsigned long commonSize = 0;
4358 char *commonStorage = NULL;
4359 unsigned long commonCounter;
4361 for(i=0;i<header->ncmds;i++)
4363 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4364 segLC = (struct segment_command*) lc;
4365 else if(lc->cmd == LC_SYMTAB)
4366 symLC = (struct symtab_command*) lc;
4367 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4370 sections = (struct section*) (segLC+1);
4371 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4375 barf("ocGetNames_MachO: no segment load command");
4377 for(i=0;i<segLC->nsects;i++)
4379 if(sections[i].size == 0)
4382 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
4384 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
4385 "ocGetNames_MachO(common symbols)");
4386 sections[i].offset = zeroFillArea - image;
4389 if(!strcmp(sections[i].sectname,"__text"))
4390 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
4391 (void*) (image + sections[i].offset),
4392 (void*) (image + sections[i].offset + sections[i].size));
4393 else if(!strcmp(sections[i].sectname,"__const"))
4394 addSection(oc, SECTIONKIND_RWDATA,
4395 (void*) (image + sections[i].offset),
4396 (void*) (image + sections[i].offset + sections[i].size));
4397 else if(!strcmp(sections[i].sectname,"__data"))
4398 addSection(oc, SECTIONKIND_RWDATA,
4399 (void*) (image + sections[i].offset),
4400 (void*) (image + sections[i].offset + sections[i].size));
4401 else if(!strcmp(sections[i].sectname,"__bss")
4402 || !strcmp(sections[i].sectname,"__common"))
4403 addSection(oc, SECTIONKIND_RWDATA,
4404 (void*) (image + sections[i].offset),
4405 (void*) (image + sections[i].offset + sections[i].size));
4407 addProddableBlock(oc, (void*) (image + sections[i].offset),
4411 // count external symbols defined here
4415 for(i=0;i<symLC->nsyms;i++)
4417 if(nlist[i].n_type & N_STAB)
4419 else if(nlist[i].n_type & N_EXT)
4421 if((nlist[i].n_type & N_TYPE) == N_UNDF
4422 && (nlist[i].n_value != 0))
4424 commonSize += nlist[i].n_value;
4427 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4432 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
4433 "ocGetNames_MachO(oc->symbols)");
4437 for(i=0;i<symLC->nsyms;i++)
4439 if(nlist[i].n_type & N_STAB)
4441 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4443 if(nlist[i].n_type & N_EXT)
4445 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4446 if((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm))
4447 ; // weak definition, and we already have a definition
4450 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4452 + sections[nlist[i].n_sect-1].offset
4453 - sections[nlist[i].n_sect-1].addr
4454 + nlist[i].n_value);
4455 oc->symbols[curSymbol++] = nm;
4462 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
4463 commonCounter = (unsigned long)commonStorage;
4466 for(i=0;i<symLC->nsyms;i++)
4468 if((nlist[i].n_type & N_TYPE) == N_UNDF
4469 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
4471 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4472 unsigned long sz = nlist[i].n_value;
4474 nlist[i].n_value = commonCounter;
4476 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4477 (void*)commonCounter);
4478 oc->symbols[curSymbol++] = nm;
4480 commonCounter += sz;
4487 static int ocResolve_MachO(ObjectCode* oc)
4489 char *image = (char*) oc->image;
4490 struct mach_header *header = (struct mach_header*) image;
4491 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4493 struct segment_command *segLC = NULL;
4494 struct section *sections;
4495 struct symtab_command *symLC = NULL;
4496 struct dysymtab_command *dsymLC = NULL;
4497 struct nlist *nlist;
4499 for(i=0;i<header->ncmds;i++)
4501 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4502 segLC = (struct segment_command*) lc;
4503 else if(lc->cmd == LC_SYMTAB)
4504 symLC = (struct symtab_command*) lc;
4505 else if(lc->cmd == LC_DYSYMTAB)
4506 dsymLC = (struct dysymtab_command*) lc;
4507 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4510 sections = (struct section*) (segLC+1);
4511 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4516 unsigned long *indirectSyms
4517 = (unsigned long*) (image + dsymLC->indirectsymoff);
4519 for(i=0;i<segLC->nsects;i++)
4521 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
4522 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
4523 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
4525 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4528 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
4529 || !strcmp(sections[i].sectname,"__pointers"))
4531 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4534 else if(!strcmp(sections[i].sectname,"__jump_table"))
4536 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4542 for(i=0;i<segLC->nsects;i++)
4544 if(!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
4548 #if defined (powerpc_HOST_ARCH)
4549 ocFlushInstructionCache( oc );
4555 #ifdef powerpc_HOST_ARCH
4557 * The Mach-O object format uses leading underscores. But not everywhere.
4558 * There is a small number of runtime support functions defined in
4559 * libcc_dynamic.a whose name does not have a leading underscore.
4560 * As a consequence, we can't get their address from C code.
4561 * We have to use inline assembler just to take the address of a function.
4565 static void machoInitSymbolsWithoutUnderscore()
4567 extern void* symbolsWithoutUnderscore[];
4568 void **p = symbolsWithoutUnderscore;
4569 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
4572 #define SymI_NeedsProto(x) \
4573 __asm__ volatile(".long " # x);
4575 RTS_MACHO_NOUNDERLINE_SYMBOLS
4577 __asm__ volatile(".text");
4580 #define SymI_NeedsProto(x) \
4581 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
4583 RTS_MACHO_NOUNDERLINE_SYMBOLS
4590 * Figure out by how much to shift the entire Mach-O file in memory
4591 * when loading so that its single segment ends up 16-byte-aligned
4593 static int machoGetMisalignment( FILE * f )
4595 struct mach_header header;
4598 fread(&header, sizeof(header), 1, f);
4601 #if x86_64_TARGET_ARCH || powerpc64_TARGET_ARCH
4602 if(header.magic != MH_MAGIC_64)
4605 if(header.magic != MH_MAGIC)
4609 misalignment = (header.sizeofcmds + sizeof(header))
4612 return misalignment ? (16 - misalignment) : 0;